US2005113451A1PendingUtilityA1

2-amino-2-alkyl-5 heptenoic and heptynoic acid derivatives useful as nitric oxide synthase inhibitors

54
Assignee: PHARMACIA CORPPriority: Sep 15, 2000Filed: Nov 1, 2004Published: May 26, 2005
Est. expirySep 15, 2020(expired)· nominal 20-yr term from priority
A61P 37/00A61P 43/00A61P 9/10A61P 35/00A61P 3/10A61P 9/00A61P 27/06A61P 25/04A61P 25/06A61P 25/28A61P 29/00A61P 27/02A61P 1/16A61P 1/04A61P 11/06A61P 1/02A61P 21/04A61P 17/02A61P 17/06A61P 19/08A61P 19/02A61P 19/00A61P 11/00C07C 271/22C07B 2200/09C07D 413/06C07B 2200/07C07C 229/30C07D 271/07C07C 257/14C07C 259/14C07F 7/1804
54
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Claims

Abstract

The present invention relates to 2-amino-2-alkyl-5 heptenoic and heptynoic acid derivatives and their use in therapy, in particular their use as nitric oxide synthase inhibitors.

Claims

exact text as granted — not AI-modified
1 . A compound of Formula I:  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and  
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         2 . The compound of  claim 1  wherein the compound is the Z isomer.  
     
     
         3 . The compound of  claim 2  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         4 . The compound of  claim 3  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by fluorine or alkoxy.    
     
     
         5 . The compound of  claim 3  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl; said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         6 . The compound of  claim 3  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl optionally substituted by fluorine.    
     
     
         7 . The compound of  claim 3  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         8 . The compound of  claim 3  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         9 . The compound of  claim 8  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         10 . The compound of  claim 9  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is C 1 -C 3  alkyl.    
     
     
         11 . The compound of  claim 10  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is methyl.    
     
     
         12 . The compound of  claim 11  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         13 . The compound of  claim 11  wherein: 
 R 1  is hydrogen;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         14 . The compound of  claim 3  wherein: 
 R 1  is halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         15 . The compound of  claim 14  wherein: 
 R 1  is halo;    R 2  is halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         16 . The compound of  claim 15  wherein: 
 R 1  is fluorine;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         17 . The compound of  claim 14  wherein: 
 R 1  is fluorine;    R 2  is selected from the group consisting of hydrogen and C 1 -C 3  alkyl; and    R 3  is methyl.    
     
     
         18 . The compound of  claim 17  wherein: 
 R 1  is fluorine;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         19 . The compound of  claim 3  wherein: 
 R 1  is methyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         20 . The compound of  claim 3  wherein: 
 R 1  is hydrogen;    R 2  is methyl; and    R 3  is methyl.    
     
     
         21 . The compound of  claim 3  wherein: 
 R 1  is methyl;    R 2  is methyl; and    R 3  is methyl.    
     
     
         22 . The compound of  claim 2  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine; and    R 3  is methyl optionally substituted by one or more alkoxy or halo.    
     
     
         23 . The compound of  claim 22  wherein: 
 R 1  is selected from the group consisting of hydrogen and fluorine;    R 2  is C 1 -C 3  alkyl substituted by one or more halo; and    R 3  is methyl.    
     
     
         24 . The compound of  claim 23  wherein: 
 R 1  is hydrogen;    R 2  is CH 2 F; and    R 3  is methyl.    
     
     
         25 . The compound of  claim 22  wherein: 
 R 1  is CH 2 F;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         26 . The compound of  claim 22  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is CH 2 F.    
     
     
         27 . The compound of  claim 22  wherein: 
 R 1  is hydrogen;    R 2  is methoxymethyl; and    R 3  is methyl.    
     
     
         28 . The compound of  claim 22  wherein: 
 R 1  is methoxymethyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         29 . The compound of  claim 22  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methoxymethyl.    
     
     
         30 . The compound of  claim 1  wherein the compound is the E isomer.  
     
     
         31 . The compound of  claim 30  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more halo or alkoxy.    
     
     
         32 . The compound of  claim 31  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl; said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         33 . The compound of  claim 31  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl optionally substituted by fluorine.    
     
     
         34 . The compound of  claim 31  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by fluorine or alkoxy.    
     
     
         35 . The compound of  claim 31  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         36 . The compound of  claim 31  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         37 . The compound of  claim 36  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         38 . The compound of  claim 37  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is C 1 -C 3  alkyl.    
     
     
         39 . The compound of  claim 38  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is methyl.    
     
     
         40 . The compound of  claim 39  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         41 . The compound of  claim 39  wherein: 
 R 1  is hydrogen;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         42 . The compound of  claim 31  wherein: 
 R 1  is halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         43 . The compound of  claim 42  wherein: 
 R 1  is halo;    R 2  is halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         44 . The compound of  claim 39  wherein: 
 R 1  is fluorine;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         45 . The compound of  claim 42  wherein: 
 R 1  is fluorine;    R 2  is selected from the group consisting of hydrogen and C 1 -C 3  alkyl; and    R 3  is methyl.    
     
     
         46 . The compound of  claim 45  wherein: 
 R 1  is fluorine;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         47 . The compound of  claim 31  wherein: 
 R 1  is methyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         48 . The compound of  claim 31  wherein: 
 R 1  is hydrogen;    R 2  is methyl; and    R 3  is methyl.    
     
     
         49 . The compound of  claim 31  wherein: 
 R 1  is methyl;    R 2  is methyl; and    R 3  is methyl.    
     
     
         50 . The compound of  claim 30  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine; and    R 3  is methyl optionally substituted by alkoxy or one or more halo.    
     
     
         51 . The compound of  claim 50  wherein: 
 R 1  is selected from the group consisting of hydrogen and fluorine;    R 2  is C 1 -C 3  alkyl substituted by one or more halo; and    R 3  is methyl.    
     
     
         52 . The compound of  claim 51  wherein: 
 R 1  is hydrogen;    R 2  is CH 2 F; and    R 3  is methyl.    
     
     
         53 . The compound of  claim 50  wherein: 
 R 1  is CH 2 F;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         54 . The compound of  claim 50  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is CH 2 F.    
     
     
         55 . The compound of  claim 50  wherein: 
 R 1  is hydrogen;    R 2  is methoxymethyl; and    R 3  is methyl.    
     
     
         56 . The compound of  claim 50  wherein: 
 R 1  is methoxymethyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         57 . The compound of  claim 50  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methoxymethyl.    
     
     
         58 . A compound of Formula II  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         59 . The compound of  claim 58  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by one or more halo.    
     
     
         60 . The compound of  claim 59  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by one or more fluorine.    
     
     
         61 . The compound of  claim 59  wherein: 
 R 3  is methyl substituted by one or more halo.    
     
     
         62 . The compound of  claim 61  wherein: 
 R 3  is methyl substituted by one or more fluorine.    
     
     
         63 . The compound of  claim 61  wherein: 
 R 3  is CH 2 F.    
     
     
         64 . The compound recited in  claim 59  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by alkoxy.    
     
     
         65 . The compound of  claim 64  wherein: 
 R 3  is methoxy methyl.    
     
     
         66 . The compound of  claim 59  wherein: 
 R 3  is C 1 -C 5  alkyl.    
     
     
         67 . The compound of  claim 65  wherein: 
 R 3  is methyl.    
     
     
         68 . A compound of Formula III  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and  
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         69 . The compound of  claim 68  wherein the compound is the Z isomer.  
     
     
         70 . The compound of  claim 69  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more halo or alkoxy.    
     
     
         71 . The compound of  claim 69  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl; said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy    
     
     
         72 . The compound of  claim 69  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl optionally substituted by fluorine.    
     
     
         73 . The compound of  claim 70  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by fluorine or alkoxy.    
     
     
         74 . The compound of  claim 70  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         75 . The compound of  claim 70  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         76 . The compound of  claim 75  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         77 . The compound of  claim 76  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is C 1 -C 3  alkyl.    
     
     
         78 . The compound of  claim 77  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is methyl.    
     
     
         79 . The compound of  claim 78  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         80 . The compound of  claim 78  wherein: 
 R 1  is hydrogen;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         81 . The compound of  claim 70  wherein: 
 R 1  is halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         82 . The compound of  claim 81  wherein: 
 R 1  is halo;    R 2  is halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         83 . The compound of  claim 82  wherein: 
 R 1  is fluorine;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         84 . The compound of  claim 81  wherein: 
 R 1  is fluorine;    R 2  is selected from the group consisting of hydrogen and C 1 -C 3  alkyl; and    R 3  is methyl.    
     
     
         85 . The compound of  claim 84  wherein: 
 R 1  is fluorine;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         86 . The compound of  claim 70  wherein: 
 R 1  is methyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         87 . The compound of  claim 70  wherein: 
 R 1  is hydrogen;    R 2  is methyl; and    R 3  is methyl.    
     
     
         88 . The compound of  claim 70  wherein: 
 R 1  is methyl;    R 2  is methyl; and    R 3  is methyl.    
     
     
         89 . The compound of  claim 69  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine; and    R 3  is methyl optionally substituted by one or more alkoxy or halo.    
     
     
         90 . The compound of  claim 89  wherein: 
 R 1  is selected from the group consisting of hydrogen and fluorine;    R 2  is C 1 -C 3  alkyl substituted by one or more halo; and    R 3  is methyl.    
     
     
         91 . The compound of  claim 90  wherein: 
 R 1  is hydrogen;    R 2  is CH 2 F; and    R 3  is methyl.    
     
     
         92 . The compound of  claim 89  wherein: 
 R 1  is CH 2 F;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         93 . The compound of  claim 89  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is CH 2 F.    
     
     
         94 . The compound of  claim 89  wherein: 
 R 1  is hydrogen;    R 2  is methoxymethyl; and    R 3  is methyl.    
     
     
         95 . The compound of  claim 89  wherein: 
 R 1  is methoxymethyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         96 . The compound of  claim 89  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methoxymethyl.    
     
     
         97 . The compound of  claim 68  wherein the compound is the E isomer.  
     
     
         98 . The compound of  claim 97  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more halo or alkoxy.    
     
     
         99 . The compound of  claim 98  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl; said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy    
     
     
         100 . The compound of  claim 98  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl optionally substituted by fluorine.    
     
     
         101 . The compound of  claim 98  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more fluorine or alkoxy.    
     
     
         102 . The compound of  claim 98  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         103 . The compound of  claim 98  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         104 . The compound of  claim 103  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         105 . The compound of  claim 104  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is C 1 -C 3  alkyl.    
     
     
         106 . The compound of  claim 105  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is methyl.    
     
     
         107 . The compound of  claim 106  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         108 . The compound of  claim 106  wherein: 
 R 1  is hydrogen;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         109 . The compound of  claim 98  wherein: 
 R 1  is halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         110 . The compound of  claim 109  wherein: 
 R 1  is halo;    R 2  is halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         111 . The compound of  claim 110  wherein: 
 R 1  is fluorine;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         112 . The compound of  claim 109  wherein: 
 R 1  is fluorine;    R 2  is selected from the group consisting of hydrogen and C 1 -C 3  alkyl; and    R 3  is methyl.    
     
     
         113 . The compound of  claim 112  wherein: 
 R 1  is fluorine;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         114 . The compound of  claim 98  wherein: 
 R 1  is methyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         115 . The compound of  claim 98  wherein: 
 R 1  is hydrogen;    R 2  is methyl; and    R 3  is methyl.    
     
     
         116 . The compound of  claim 98  wherein: 
 R 1  is methyl;    R 2  is methyl; and    R 3  is methyl.    
     
     
         117 . The compound of  claim 97  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine; and    R 3  is methyl optionally substituted by one or more alkoxy or halo.    
     
     
         118 . The compound of  claim 117  wherein: 
 R 1  is selected from the group consisting of hydrogen and fluorine;    R 2  is C 1 -C 3  alkyl substituted by one or more halo; and    R 3  is methyl.    
     
     
         119 . The compound of  claim 118  wherein: 
 R 1  is hydrogen;    R 2  is CH 2 F; and    R 3  is methyl.    
     
     
         120 . The compound of  claim 117  wherein: 
 R 1  is CH 2 F;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         121 . The compound of  claim 117  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is CH 2 F.    
     
     
         122 . The compound of  claim 117  wherein: 
 R 1  is hydrogen;    R 2  is methoxymethyl; and    R 3  is methyl.    
     
     
         123 . The compound of  claim 117  wherein: 
 R 1  is methoxymethyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         124 . The compound of  claim 117  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methoxymethyl.    
     
     
         125 . A compound of Formula IV  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         126 . The compound of  claim 125  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by one or more halo.    
     
     
         127 . The compound of  claim 126  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by one or more fluorine.    
     
     
         128 . The compound of  claim 126  wherein: 
 R 3  is methyl substituted by one or more halo.    
     
     
         129 . The compound of  claim 128  wherein: 
 R 3  is methyl substituted by one or more fluorine.    
     
     
         130 . The compound of  claim 128  wherein: 
 R 3  is CH 2 F.    
     
     
         131 . The compound recited in  claim 126  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by alkoxy.    
     
     
         132 . The compound of  claim 131  wherein: 
 R 3  is methoxy methyl.    
     
     
         133 . The compound of  claim 126  wherein: 
 R 3  is C 1 -C 5  alkyl.    
     
     
         134 . The compound of  claim 132  wherein: 
 R 3  is methyl.    
     
     
         135 . A compound of Formula V  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and  
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         136 . The compound of  claim 135  wherein the compound is the Z isomer.  
     
     
         137 . The compound of  claim 136  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         138 . The compound of  claim 137  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl; said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy    
     
     
         139 . The compound of  claim 137  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl optionally substituted by fluorine.    
     
     
         140 . The compound of  claim 136  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by fluorine or alkoxy.    
     
     
         141 . The compound of  claim 137  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         142 . The compound of  claim 137  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         143 . The compound of  claim 142  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         144 . The compound of  claim 143  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is C 1 -C 3  alkyl.    
     
     
         145 . The compound of  claim 144  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is methyl.    
     
     
         146 . The compound of  claim 145  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         147 . The compound of  claim 145  wherein: 
 R 1  is hydrogen;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         148 . The compound of  claim 137  wherein: 
 R 1  is halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         149 . The compound of  claim 148  wherein: 
 R 1  is halo;    R 2  is halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         150 . The compound of  claim 149  wherein: 
 R 1  is fluorine;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         151 . The compound of  claim 148  wherein: 
 R 1  is fluorine;    R 2  is selected from the group consisting of hydrogen and C 1 -C 3  alkyl; and    R 3  is methyl.    
     
     
         152 . The compound of  claim 151  wherein: 
 R 1  is fluorine;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         153 . The compound of  claim 137  wherein: 
 R 1  is methyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         154 . The compound of  claim 137  wherein: 
 R 1  is hydrogen;    R 2  is methyl; and    R 3  is methyl.    
     
     
         155 . The compound of  claim 137  wherein: 
 R 1  is methyl;    R 2  is methyl; and    R 3  is methyl.    
     
     
         156 . The compound of  claim 136  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine; and    R 3  is C 1 -C 5  alkyl optionally substituted by alkoxy or one or more halo.    
     
     
         157 . The compound of  claim 156  wherein: 
 R 1  is selected from the group consisting of hydrogen and fluorine;    R 2  is C 1 -C 3  alkyl substituted by one or more halo; and    R 3  is methyl.    
     
     
         158 . The compound of  claim 157  wherein: 
 R 1  is hydrogen;    R 2  is CH 2 F; and    R 3  is methyl.    
     
     
         159 . The compound of  claim 156  wherein: 
 R 1  is CH 2 F;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         160 . The compound of  claim 159  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is CH 2 F.    
     
     
         161 . The compound of  claim 159  wherein: 
 R 1  is hydrogen;    R 2  is methoxymethyl; and    R 3  is methyl.    
     
     
         162 . The compound of  claim 156  wherein: 
 R 1  is methoxymethyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         163 . The compound of  claim 156  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methoxymethyl.    
     
     
         164 . The compound of  claim 135  wherein the compound is the E isomer.  
     
     
         165 . The compound of  claim 164  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more halo or alkoxy.    
     
     
         166 . The compound of  claim 165  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl; said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy    
     
     
         167 . The compound of  claim 165  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl optionally substituted by fluorine.    
     
     
         168 . The compound of  claim 165  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by fluorine or alkoxy.    
     
     
         169 . The compound of  claim 165  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 3  alkyl;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         170 . The compound of  claim 165  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         171 . The compound of  claim 170  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         172 . The compound of  claim 171  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is C 1 -C 3  alkyl.    
     
     
         173 . The compound of  claim 172  wherein: 
 R 1  is hydrogen;    R 2  is selected from the group consisting of hydrogen and fluorine; and    R 3  is methyl.    
     
     
         174 . The compound of  claim 172  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         175 . The compound of  claim 173  wherein: 
 R 1  is hydrogen;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         176 . The compound of  claim 165  wherein: 
 R 1  is halo;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 3  alkyl; and    R 3  is C 1 -C 3  alkyl.    
     
     
         177 . The compound of  claim 176  wherein: 
 R 1  is halo;    R 2  is halo; and    R 3  is C 1 -C 3  alkyl.    
     
     
         178 . The compound of  claim 177  wherein: 
 R 1  is fluorine;    R 2  is fluorine; and    R 3  is methyl.    
     
     
         179 . The compound of  claim 176  wherein: 
 R 1  is fluorine;    R 2  is selected from the group consisting of hydrogen and C 1 -C 3  alkyl; and    R 3  is methyl.    
     
     
         180 . The compound of  claim 179  wherein: 
 R 1  is fluorine;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         181 . The compound of  claim 165  wherein: 
 R 1  is methyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         182 . The compound of  claim 165  wherein: 
 R 1  is hydrogen;    R 2  is methyl; and    R 3  is methyl.    
     
     
         183 . The compound of  claim 165  wherein: 
 R 1  is methyl;    R 2  is methyl; and    R 3  is methyl.    
     
     
         184 . The compound of  claim 164  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine;    R 2  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy or one or more fluorine; and    R 3  is methyl optionally substituted by one or more alkoxy or halo.    
     
     
         185 . The compound of  claim 184  wherein: 
 R 1  is selected from the group consisting of hydrogen and fluorine;    R 2  is C 1 -C 3  alkyl substituted by one or more halo; and    R 3  is methyl.    
     
     
         186 . The compound of  claim 185  wherein: 
 R 1  is hydrogen;    R 2  is CH 2 F; and    R 3  is methyl.    
     
     
         187 . The compound of  claim 185  wherein: 
 R 1  is CH 2 F;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         188 . The compound of  claim 184  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is CH 2 F.    
     
     
         189 . The compound of  claim 184  wherein: 
 R 1  is hydrogen;    R 2  is methoxymethyl; and    R 3  is methyl.    
     
     
         190 . The compound of  claim 184  wherein: 
 R 1  is methoxymethyl;    R 2  is hydrogen; and    R 3  is methyl.    
     
     
         191 . The compound of  claim 184  wherein: 
 R 1  is hydrogen;    R 2  is hydrogen; and    R 3  is methoxymethyl.    
     
     
         192 . A compound of Formula VI  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         193 . The compound of  claim 192  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by one or more halo.    
     
     
         194 . The compound of  claim 193  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by one or more fluorine.    
     
     
         195 . The compound of  claim 193  wherein: 
 R 3  is methyl substituted by one or more halo.    
     
     
         196 . The compound of  claim 195  wherein: 
 R 3  is methyl substituted by one or more fluorine.    
     
     
         197 . The compound of  claim 195  wherein: 
 R 3  is CH 2 F.    
     
     
         198 . The compound recited in  claim 193  wherein: 
 R 3  is C 1 -C 5  alkyl substituted by alkoxy.    
     
     
         199 . The compound of  claim 198  wherein: 
 R 3  is methoxy methyl.    
     
     
         200 . The compound of  claim 193  wherein: 
 R 3  is C 1 -C 5  alkyl.    
     
     
         201 . The compound of  claim 199  wherein: 
 R 3  is methyl.    
     
     
         202 . A novel intermediate compound selected from:  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         203 . A compound selected from the group consisting of: 
 (2S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5Z)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5E)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid;    (2S,5E)-2-amino-2-ethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2-methoxymethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2-fluoromethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2,5-dimethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-5-fluoromethyl-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2,6-dimethyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-6-fluoromethyl-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-ethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methoxymethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-fluoromethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2,5-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-5-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2,6-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-6-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid;    (2S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5Z)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5E)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid, dihydrochloride;    (2S,5E)-2-amino-2-ethyl-6-fluoro-7-[(-1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2-methoxymethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2-fluoromethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2,5-dimethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-5-fluoromethyl-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2,6-dimethyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-6-fluoromethyl-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-ethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methoxymethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-fluoromethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2,5-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-5-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2,6-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-6-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride; and    (2S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid, dihydrochloride.    
     
     
         204 . A novel intermediate compound selected from: 
 4-[(2E)-5-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-fluoro-2-pentenyl]-3-methyl-1,2,4-oxadiazol-5(4H)-one;    4-[(2E)-2-fluoro-5-hydroxy-2-pentenyl]-3-methyl-1,2,4-oxadiazol-5(4H)-one;    4-[(2E)-2-fluoro-5-iodo-2-pentenyl]-3-methyl-1,2,4-oxadiazol-5(4H)-one;    (3S,6R)-3-[(3E)-4-fluoro-5-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-3-pentenyl]-3,6-dihydro-3-methyl-6-(1-methylethyl)-5-phenyl-2H-1,4-oxazin-2-one;    N-[(2E)-5-[(3S,6R)-3,6-dihydro-3-methyl-6-(1-methylethyl)-2-oxo-5-phenyl-2H-1,4-oxazin-3-yl]-2-fluoro-2-pentenyl]ethanimidamide;    (5E)-2-amino-6-fluoro-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester;    (2S,5E)-2-amino-6-fluoro-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester;    (2S,5E)-2-amino-6-fluoro-7-[[(1E)-1-(hydroxyimino)ethyl]amino]-2-methyl-5-heptenoic acid;    (2S,5E)-2-amino-6-fluoro-7-[(1-iminoethyl)amino]-2-methyl-5-heptenoic acid, methyl ester;    (2R,5E)-2-amino-6-fluoro-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester;    (2R,5E)-2-amino-6-fluoro-7-[(1-iminoethyl)amino]-2-methyl-5-heptenoic acid, ethyl ester;    (5E)-2-amino-6-fluoro-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester;    (5E)-2-[[(1Z)-(4-chlorophenyl)methylidene]amino]-6-fluoro-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester;    (5E)-2-amino-6-fluoro-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester;    (5E)-2-amino-6-fluoro-7-[(1-iminoethyl)amino]-2-methyl-5-heptenoic acid, methyl ester;    Methyl (5E)-7-[(tert-butoxycarbonyl)amino]-2-{[(1Z)-(2,4-dichlorophenyl)methylidene]amino}-5-fluoro-2-methylhept-5-enoate;    (5E)-2,7-diamino-5-fluoro-2-methyl-5-heptenoic acid, methyl ester, dihydrochloride;    (5E)-2-amino-5-fluoro-7-[(1-iminoethyl)amino]-2-methyl-5-heptenoic acid, methyl ester, monohydrochloride;    (5Z)-2-[[(1E)-(2,4-dichlorophenyl)methylidene]amino]-7-[[(1,1-dimethylethoxy)carbonyl]amino]-5-fluoro-2-methyl-5-heptenoic acid, methyl ester;    (5Z)-2,7-diamino-5-fluoro-2-methyl-5-heptenoic acid, methyl ester, dihydrochloride;    (5Z)-2-amino-5-fluoro-7-[(1-iminoethyl)amino]-2-methyl-5-heptenoic acid, methyl ester, dihydrochloride;    4-[(2Z)-5-hydroxy-2-pentenyl]-3-methyl-1,2,4-oxadiazol-5(4H)-one;    (3Z)-5-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-3-pentenyl ester, acetic acid, trifluoro-;    4-[(2Z)-5-[(2R,4S)-3-benzoyl-2-(1,1-dimethylethyl)-4-methyl-5-oxo-4-oxazolidinyl]-2-pentenyl]-3-methyl-1,2,4-oxadiazol-5(4H)-one;    3-Methyl-4-[5-(tetrahydro-pyran-2-yloxy)-pent-2-enyl]-4H-[1,2,4]oxadiazol-5-one;    4-(5-Hydroxy-pent-2-enyl)-3-methyl-4H-[1,2,4]oxadiazol-5-one;    Methanesulfonic acid 5-(3-methyl-5-oxo-[1,2,4]oxadiazol-4-yl)-pent-3-enyl ester;    4-(5-Iodo-pent-2-enyl)-3-methyl-4H-[1,2,4]oxadiazol-5-one;    Rac-2-Amino-2-methyl-7-(3-methyl-5-oxo-[1,2,4]oxadiazol-4-yl)-hept-5-enoic acid methyl ester;    Rac-2-Amino-2-methyl-7-(3-methyl-5-oxo-[1,2,4]oxadiazol-4-yl)-hept-5-enoic acid;    (2S,5Z)-2-Amino-2-methyl-7-(3-methyl-5-oxo-[1,2,4]oxadiazol-4-yl)-hept-5-enoic acid methyl ester;    (2S,5Z)-7-Acetimidoylamino-2-amino-2-methyl-hept-5-enoic acid methyl ester, dihydrochloride hydrate;    (2S,5Z)-2-amino-7-[[(1E)-1-(hydroxyimino)ethyl]amino]-2-methyl-5-heptenoic acid;    4-[(2E)-5-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-pentenyl]-3-methyl-1,2,4-oxadiazol-5(4H)-one;    4-[(2E)-5-hydroxy-2-pentenyl]-3-methyl-2,4-oxadiazol-5(4H)-one;    (5E)-2-[[(1E)-(3,4-dichlorophenyl)methylidene]amino]-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester;    (5E)-2-amino-2-methyl-7-(3-methyl-5-oxo-1,2,4-oxadiazol-4(5H)-yl)-5-heptenoic acid, methyl ester; and    Methyl (5E)-2-amino-7-(ethanimidoylamino)-2-methylhept-5-enoate.    
     
     
         205 . A pharmaceutical composition comprising at least one compound selected from the group consisting of: 
 (2S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5Z)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S,5E)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2R/S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid;    (2S,5E)-2-amino-2-ethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2-methoxymethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2-fluoromethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2,5-dimethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-5-fluoromethyl-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-2,6-dimethyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-6-fluoromethyl-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-ethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-methoxymethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2-fluoromethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2,5-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-5-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5Z)-2-amino-2,6-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S,5E)-2-amino-6-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid;    (2S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid;    (2S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5E)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5Z)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5Z)-2-amino-2-methyl-5,6-difluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R,5Z)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S,5E)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2R/S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid, dihydrochloride;    (2S,5E)-2-amino-2-ethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2-methoxymethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2-fluoromethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2,5-dimethyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-5-fluoromethyl-2-methyl-6-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-2,6-dimethyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-6-fluoromethyl-2-methyl-5-fluoro-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-ethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-methoxymethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2-fluoromethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2,5-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-5-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5Z)-2-amino-2,6-dimethyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride;    (2S,5E)-2-amino-6-fluoromethyl-2-methyl-7-[(1-iminoethyl)amino]-5-heptenoic acid, dihydrochloride; and    (2S)-2-amino-2-methyl-7-[(1-iminoethyl)amino]-5-heptynoic acid, dihydrochloride.    
     
     
         206 . A compound of Formula VII:  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 4  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and  
 R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         207 . The compound of  claim 206  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         208 . The compound of  claim 206  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen and halo; and    R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         209 . The compound of  claim 207  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.    
     
     
         210 . The compound of  claim 209  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; ‘R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more halo    
     
     
         211 . The compound of  claim 208  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 5  is halo.    
     
     
         212 . The compound of  claim 211  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 5  is fluorine.    
     
     
         213 . The compound of  claim 210  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl substituted by halo.    
     
     
         214 . The compound of  claim 213  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is CH 2 F.    
     
     
         215 . The compound of  claim 214  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is CH 2 F.    
     
     
         216 . The compound of  claim 208  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is halo; and    R 5  is halo.    
     
     
         217 . The compound of  claim 208  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is halo.    
     
     
         218 . The compound of  claim 217  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is fluorine, and    R 5  is fluorine.    
     
     
         219 . The compound of  claim 210  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is methyl.    
     
     
         220 . A compound of Formula VIII:  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 4  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and  
 R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         221 . The compound of  claim 220  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo,    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         222 . The compound of  claim 220  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen and halo; and    R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         223 . The compound of  claim 221  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.    
     
     
         224 . The compound of  claim 223  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more halo    
     
     
         225 . The compound of  claim 222  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 5  is halo.    
     
     
         226 . The compound of  claim 225  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;.    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 5  is fluorine.    
     
     
         227 . The compound of  claim 224  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl substituted by halo.    
     
     
         228 . The compound of  claim 227  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is CH 2 F.    
     
     
         229 . The compound of  claim 228  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is CH 2 F.    
     
     
         230 . The compound of  claim 222  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by a halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is halo; and    R 5  is halo.    
     
     
         231 . The compound of  claim 221  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is halo.    
     
     
         232 . The compound of  claim 231  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is fluorine; and    R 5  is fluorine.    
     
     
         233 . The compound of  claim 224  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is methyl.    
     
     
         234 . A compound of Formula IX:  
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 2  is selected from the group consisting of hydrogen halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;  
 R 4  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and  
 R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.  
 
     
     
         235 . The compound of  claim 234  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         236 . The compound of  claim 234  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen and halo; and    R 5  is selected from the group consisting of halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy.    
     
     
         237 . The compound of  claim 235  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo.    
     
     
         238 . The compound of  claim 237  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by one or more halo    
     
     
         239 . The compound of  claim 234  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 5  is halo.    
     
     
         240 . The compound of  claim 239  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo; and    R 5  is fluorine.    
     
     
         241 . The compound of  claim 238  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is C 1 -C 5  alkyl substituted by halo.    
     
     
         242 . The compound of  claim 241  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is selected from the group consisting of hydrogen, halo and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy; and    R 5  is CH 2 F.    
     
     
         243 . The compound of  claim 242  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is CH 2 F.    
     
     
         244 . The compound of  claim 236  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is halo; and    R 5  is halo.    
     
     
         245 . The compound of  claim 234  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is halo.    
     
     
         246 . The compound of  claim 245  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is fluorine; and    R 5  is fluorine.    
     
     
         247 . The compound of  claim 238  wherein: 
 R 1  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 2  is selected from the group consisting of hydrogen, halo, and C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 3  is C 1 -C 5  alkyl, said C 1 -C 5  alkyl optionally substituted by halo or alkoxy, said alkoxy optionally substituted by one or more halo;    R 4  is hydrogen; and    R 5  is methyl.

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