US2015202185A1PendingUtilityA1

Compositions and methods for treating lysosomal disorders

Assignee: NEURALTUS PHARMACEUTICALS INCPriority: Nov 29, 2007Filed: Apr 1, 2015Published: Jul 23, 2015
Est. expiryNov 29, 2027(~1.4 yrs left)· nominal 20-yr term from priority
A61P 43/00A61P 7/06A61P 3/06A61P 39/02A61P 3/00A61P 25/00A61P 11/00A61P 17/00A61P 13/02A61K 31/41A61K 31/45A61K 31/445A61K 31/4164A61K 45/06A61K 31/4178A61K 31/4174Y02A50/30
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Claims

Abstract

The present invention provides compositions and methods for treating lysosomal disorders using a class of substituted imidazole derivatives or compounds.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method for treating a lipid storage disease in a subject comprising administering to said subject an effective amount of a compound of Formula 1 
       
         
           
           
               
               
           
         
       
       in the form of a free compound or its pharmaceutically acceptable pro-drug, metabolite, analogue, derivative, solvate or salt wherein the substituents R 1 , R 2 , R 3 , and R 4  are defined as described in A and B below:
 (a) when R 1  is selected from the group consisting of:
 (i) substituted C 1-11  alkyl or substituted C 2-11  alkenyl, wherein the substituents are selected from the group consisting of hydroxy, C 1-6  alkyloxy; or 
 (ii) mono-, di-, and tri-substituted aryl-C 0-11  alkyl wherein aryl is selected from the group consisting of phenyl, furyl, thienyl wherein the substituents are selected from the group consisting of:
 (a) phenyl, trans-2-phenylethenyl, 2-phenylethynyl, 2-phenylethyl, wherein the said phenyl group is mono- or disubstituted with a member selected from the group consisting of hydroxy, halo, C 1-4  alkyl and C 1-4  alkyloxy, 
 (b) substituted C 1-6  alkyl, substituted C 2-6  alkyloxy, substituted C 2-6  alkylthio, substituted C 2-6  alkoxycarbonyl, wherein the substituents are selected from the group consisting of C 1-6  alkoxy, and C 1-6  alkylthio; and 
 (c) C 1-11  CO 2 R 5 , C 1-11 CONHR 5 , trans-CH═CHCO 2 R 5 , or trans-CH═CHCONHR 5  wherein R 5  is C 1-11  alkyl, or phenyl C 1-11  alkyl, C 1-6  alkoxycarbonylmethyleneoxy; 
 
 
 
       then R 2  and R 3  are each independently selected from the group consisting of mono-, di, and tri-substituted phenyl wherein the substituents are independently selected from:
 (i) substituted C 1-6  alkyl, 
 (ii) substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, 
 (iv) C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino, 
 (v) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
       wherein the substituents are selected from the group consisting of:
  (a) hydroxy, C 1-6  alkylalkoxy, C 1-6  alkylamino 
  (b) C 3-6  alkenyloxy, C3-6 alkenylamino, or 
  (c) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
       or R 2  and R 3  taken together forming an aryl group or substituted aryl, wherein the substituents are defined as above in (i)-(v); 
       and R 4  is selected from the group consisting of:
 (i) hydrogen; 
 (ii) substituted C 1-11  alkyl or C 2-11  alkenyl wherein the substituents are independently selected from the group consisting of hydrogen, hydroxy, C 1-6  alkyloxy, C 1-6 alkylthio, C 1-6  alkylamino, phenyl-C 1-6  alkylamino, C 1-6  alkoxycarbonyl; or 
 (iii) substituted aryl C 0-11  alkyl wherein the aryl group is selected from phenyl, imidazolyl, furyl, thienyl in which the substituents are selected from A(a-c); or 
 
       (b) when R 1  is selected from the group consisting of:
 Mono-, di-, and tri-substituted aryl-C 0-6  alkyl wherein aryl is selected from the group consisting of phenyl, thienyl, and the substituents are selected from the group consisting of:
 (a) trans-2-substituted benzimidazolylethenyl, trans-2-substituted benzoxazolylethenyl, trans-2-substituted benzthiazolylethenyl, in which the substituents are selected from the group consisting of hydrogen, hydroxy, halo, trihalomethyl, C 1-4  alkyl and C 1-4  alkyloxy, C 1-4  alkyloxycarbonyl, C 1-4  alkylamino, di(C 1-4  alkyl)amino, C 3-6  alkenylamino, di(C 3-6  alkenyl)amino, C 1-4  alkyloxy-C 1-4  alkylamino, substituted C 1-4  alkyl and C 1-4  alkyloxy, substituted C 1-4  alkyloxycarbonyl, substituted C 1-4  alkylamino, di(substituted C 1-4  alkyl)amino, substituted C 3-6  alkenylamino, di(substituted C 3-6  alkenyl)amino, wherein the substituents are as defined above, 
 (b) trans-2-cyano ethenyl, trans-2-alkylsulfonyl ethenyl, trans-2-alkenylsulfonyl ethenyl, trans-2-substituted alkylsulfonyl ethenyl, trans-2-substituted alkenylsulfonyl ethenyl, in which the substituents are defined above, 
 (c) C 1-6  CO 2 R 5 , trans-CH═CHCO 2 R 5 , C 1-6 CONHR 5 , or trans-CH═CHCONHR 5 , wherein R 5  is C 1-6  alkoxy C 2-6  alkyl, amino C 2-6  alkyl, C 1-6  alkylamino C 2-6  alkyl, di(C 1-6  alkyl)amino C 2-6  alkyl, C 1-6  alkylthio C 2-6  alkyl, substituted C 1-6  alkoxy C 2-6  alkyl, substituted C 1-6  alkylamino C 2-6  alkyl, di(substituted C 1-6  alkyl)amino C 2-6  alkyl, substituted C 1-6  alkylthio C 2-6  alkyl, in which the substituents are selected from the group consisting of pyrrolidino, piperidino morpholino, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, imidazolyl, oxazolyl, thiazolyl, 
 (d) C 1-6 CONR 6 R 7 , or trans-CH═CHCONR 6 R 7 , wherein R 6  and R 7  are independently selected from the group consisting of C 1-6  alkyl, phenyl C 1-6  alkyl, C 1-6  alkoxycarbonylmethyleneoxy, hydroxy C 2-6  alkyl, C 1-6  alkyloxy C 2-6  alkyl, amino C 2-6  alkyl, C 1-6  alkylamino C 2-6  alkyl, di(C 1-6  alkyl)amino C 2-6  alkyl, C 1-6  alkylthio C 2-6  alkyl, substituted C 1-6  alkoxy C 2-6  alkyl, substituted C 1-6  alkylamino C 2-6  alkyl, di(substituted C 1-6  alkyl)amino C 2-6  alkyl, substituted C 1-6  alkylthio C 2-6  alkyl, wherein the substituents are selected from the group consisting of pyrrolidino, piperidino, morpholino, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, imidazolyl, oxazolyl, thiazolyl, 
 (e) R 7 C(O) C 1-6  alkyl, R 7 C(O) C 2-6  alkenyl, in which R 7  is defined as above [ 2 (d)], 
 (f) HO—C 1-6  alkyl-C 2-6  alkenyl, R 7 —O—C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 O—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 —C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, wherein R 6  and R 7  is defined as above [ 2 (d)], 
 (g) R 7 —O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 NH—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 6 R 7 N-C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 NH—C(O)—O—C 0-3  C 3-6  cycloalkan-1-yl, R 6 R 7 N-C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 O—C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 —C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 O—C(O)—Co-3 alkyl-C 3-6  cycloalkan-1-yl, wherein R 7  and is defined as above [B(d)]; 
 
 
       then R 2  and R 3  are each independently selected from the group consisting of:
 (1) hydrogen, halo, trihalomethyl, C 1-6  alkyl, substituted C 1-6  alkyl, C 2-6  alkenyl, substituted C 1-6  alkenyl, C 1-6  alkyloxy, substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, C 1-6  alkylamino, substituted C 1-6  alkylamino, C 3-6  alkenylamino, substituted C 3-6  alkenylamino, 
 (2) mono-, di-, and tri-substituted phenyl wherein the substituents are independently selected from:
 (i) halo, trifluoromethyl, substituted C 1-6  alkyl, 
 (ii) C 1-6  alkyloxy, substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) C 1-6  alkyl-amino, di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino, or 
 (iv) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
 
       wherein the substituents are selected from the group consisting of:
  (a) hydrogen, hydroxy, halo, trifluoromethyl, 
  (b) C 1-6  alkylalkoxy, C 1-6  alkylamino, C 1-6  alkylthio, 
  (c) C 3-6  alkenyloxy, C 3-6  alkenylamino, C 3-6  alkenylthio, or 
  (d) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino; 
 
       with the proviso that at least one of R 2  and R 3  group be selected from [B (2)] and the phenyl and the substituents be selected from (ii)-(v) above; or R 2  and R 3  taken together forming an aryl group such as phenyl, pyridyl, in which the aryl may be optionally substituted, wherein the substituents are defined as above in (i)-(iv); 
       and R 4  is selected from the group consisting of:
  (a) hydrogen; 
  (b) substituted C 1-11  alkyl or C 2-11  alkenyl wherein the substituents are independently selected from the group consisting of:
 (i) hydrogen, hydroxy, C 1-6  alkyloxy, C 1-6 alkylthio, C 1-6  alkylamino, phenyl-C 1-6  alkylamino, C 1-6  alkoxycarbonyl; 
 (ii) substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino; and 
 (iv) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, and 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino; and 
 
  (c) aryl C 0-11  alkyl wherein the aryl group is selected from phenyl, imidazolyl, furyl, thienyl. 
 
     
     
         2 . The method of  claim 1 , wherein the compound of Formula 1 has the following formula (Formula 2): 
       
         
           
           
               
               
           
         
       
       in the form of a free compound or as its pharmaceutically-acceptable pro-drug, metabolite, analogue, derivative, solvate or salt. 
     
     
         3 . The method of  claim 1 , wherein the disease is characterized by a defect in glycosphingolipid synthesis. 
     
     
         4 . The method of  claim 3 , wherein the glycosphingolipid is a neutral glycosphingolipid. 
     
     
         5 . The method of  claim 1 , wherein the disease is characterized by a defect in ceramide synthesis. 
     
     
         6 . The method of  claim 1 , wherein the disease is Gaucher's disease or Fabry's disease. 
     
     
         7 . The method of  claim 1 , wherein the disease is characterized by a defect in ganglioside synthesis in the subject. 
     
     
         8 . The method of  claim 7 , wherein the ganglioside is a GM1 ganglioside or a GM2 ganglioside. 
     
     
         9 . The method of  claim 8 , wherein the disease is Tay Sach's disease or Sandhoff's disease. 
     
     
         10 . The method of  claim 7 , wherein the disease is cystic fibrosis. 
     
     
         11 . A method for treating a lipid storage disease in a subject comprising administering to the subject an effective amount of:
 a first compound of Formula 1   
       
         
           
           
               
               
           
         
       
       in the form of a free compound or its pharmaceutically acceptable pro-drug, metabolite, analogue, derivative, solvate or salt wherein the substituents R 1 , R 2 , R 3 , and R 4  are defined as described in A and B below:
 (a) when R 1  is selected from the group consisting of:
 (i) substituted C 1-11  alkyl or substituted C 2-11  alkenyl, wherein the substituents are selected from the group consisting of hydroxy, C 1-6  alkyloxy; or 
 (ii) mono-, di-, and tri-substituted aryl-C 0-11  alkyl wherein aryl is selected from the group consisting of phenyl, furyl, thienyl wherein the substituents are selected from the group consisting of:
 (a) phenyl, trans-2-phenylethenyl, 2-phenylethynyl, 2-phenylethyl, wherein the said phenyl group is mono- or disubstituted with a member selected from the group consisting of hydroxy, halo, C 1-4  alkyl and C 1-4  alkyloxy, 
 (b) substituted C 1-6  alkyl, substituted C 2-6  alkyloxy, substituted C 2-6  alkylthio, substituted C 2-6  alkoxycarbonyl, wherein the substituents are selected from the group consisting of C 1-6  alkoxy, and C 1-6  alkylthio; and 
 (c) C 1-11  CO 2 R 5 , C 1-11 CONHR 5 , trans-CH═CHCO 2 R 5 , or trans-CH═CHCONHR 5  wherein R 5  is C 1-11  alkyl, or phenyl C 1-11  alkyl, C 1-6  alkoxycarbonylmethyleneoxy; 
 
 
 
       then R 2  and R 3  are each independently selected from the group consisting of mono-, di, and tri-substituted phenyl wherein the substituents are independently selected from:
 (i) substituted C 1-6  alkyl, 
 (ii) substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, 
 (iv) C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino, 
 (v) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
       wherein the substituents are selected from the group consisting of:
  (a) hydroxy, C 1-6  alkylalkoxy, C 1-6  alkylamino 
  (b) C 3-6  alkenyloxy, C3-6 alkenylamino, or 
  (c) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
       or R 2  and R 3  taken together forming an aryl group or substituted aryl, wherein the substituents are defined as above in (i)-(v); 
       and R 4  is selected from the group consisting of:
 (i) hydrogen; 
 (ii) substituted C 1-11  alkyl or C 2-11  alkenyl wherein the substituents are independently selected from the group consisting of hydrogen, hydroxy, C 1-6  alkyloxy, C i-6 alkylthio, C 1-6  alkylamino, phenyl-C 1-6  alkylamino, C 1-6  alkoxycarbonyl; or 
 (iii) substituted aryl C 0-11  alkyl wherein the aryl group is selected from phenyl, imidazolyl, furyl, thienyl in which the substituents are selected from A(a-c); or 
 (b) when R 1  is selected from the group consisting of:
 Mono-, di-, and tri-substituted aryl-C 0-6  alkyl wherein aryl is selected from the group consisting of phenyl, thienyl, and the substituents are selected from the group consisting of:
 (a) trans-2-substituted benzimidazolylethenyl, trans-2-substituted benzoxazolylethenyl, trans-2-substituted benzthiazolylethenyl, in which the substituents are selected from the group consisting of hydrogen, hydroxy, halo, trihalomethyl, C 1-4  alkyl and C 1-4  alkyloxy, C 1-4  alkyloxycarbonyl, C 1-4  alkylamino, alkyl)amino, C 3-6  alkenylamino, di(C 3-6  alkenyl)amino, C 1-4  alkyloxy-C 1-4  alkylamino, substituted C 1-4  alkyl and C 1-4  alkyloxy, substituted C 1-4  alkyloxycarbonyl, substituted C 1-4  alkylamino, di(substituted C 1-4  alkyl)amino, substituted C 3-6  alkenylamino, di(substituted C 3-6  alkenyl)amino, wherein the substituents are as defined above, 
 (b) trans-2-cyano ethenyl, trans-2-alkylsulfonyl ethenyl, trans-2-alkenylsulfonyl ethenyl, trans-2-substituted alkylsulfonyl ethenyl, trans-2-substituted alkenylsulfonyl ethenyl, in which the substituents are defined above, 
 (c) C 1-6  CO 2 R 5 , trans-CH═CHCO 2 R 5 , C 1-6 CONHR 5 , or trans-CH═CHCONHR 5 , wherein R 5  is C 1-6  alkoxy C 2-6  alkyl, amino C 2-6  alkyl, C 1-6  alkylamino C 2-6  alkyl, di(C 1-6  alkyl)amino C 2-6  alkyl, C 1-6  alkylthio C 2-6  alkyl, substituted C 1-6  alkoxy C 2-6  alkyl, substituted C 1-6  alkylamino C 2-6  alkyl, di(substituted C 1-6  alkyl)amino C 2-6  alkyl, substituted C 1-6  alkylthio C 2-6  alkyl, in which the substituents are selected from the group consisting of pyrrolidino, piperidino morpholino, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, imidazolyl, oxazolyl, thiazolyl, 
 (d) C 1-6 CONR 6 R 7 , or trans-CH═CHCONR 6 R 7 , wherein R 6  and R 7  are independently selected from the group consisting of C 1-6  alkyl, phenyl C 1-6  alkyl, C 1-6  alkoxycarbonylmethyleneoxy, hydroxy C 2-6  alkyl, C 1-6  alkyloxy C 2-6  alkyl, amino C 2-6  alkyl, C 1-6  alkylamino C 2-6  alkyl, di(C 1-6  alkyl)amino C 2-6  alkyl, C 1-6  alkylthio C 2-6  alkyl, substituted C 1-6  alkoxy C 2-6  alkyl, substituted C 1-6  alkylamino C 2-6  alkyl, di(substituted C 1-6  alkyl)amino C 2-6  alkyl, substituted C 1-6  alkylthio C 2-6  alkyl, wherein the substituents are selected from the group consisting of pyrrolidino, piperidino, morpholino, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, imidazolyl, oxazolyl, thiazolyl, 
 (e) R 7 C(O) C 1-6  alkyl, R 7 C(O) C 2-6  alkenyl, in which R 7  is defined as above [ 2 (d)], 
 (f) HO—C 1-6  alkyl-C 2-6  alkenyl, R 7 —O—C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 O—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 —C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, wherein R 6  and R 7  is defined as above [ 2 (d)], 
 (g) R 7 —O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 NH—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 6 R 7 N-C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 NH—C(O)—O—C 0-3  C 3-6  cycloalkan-1-yl, R 6 R 7 N-C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 O—C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 —C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 O—C(O)—Co-3 alkyl-C 3-6  cycloalkan-1-yl, wherein R 7  and is defined as above [B(d)]; 
 
 
 
       then R 2  and R 3  are each independently selected from the group consisting of:
 (1) hydrogen, halo, trihalomethyl, C 1-6  alkyl, substituted C 1-6  alkyl, C 2-6  alkenyl, substituted C 1-6  alkenyl, C 1-6  alkyloxy, substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, C 1-6  alkylamino, substituted C 1-6  alkylamino, C 3-6  alkenylamino, substituted C 3-6  alkenylamino, 
 (2) mono-, di-, and tri-substituted phenyl wherein the substituents are independently selected from:
 (i) halo, trifluoromethyl, substituted C 1-6  alkyl, 
 (ii) C 1-6  alkyloxy, substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) C 1-6  alkyl-amino, di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino, or 
 (iv) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
 
       wherein the substituents are selected from the group consisting of:
  (a) hydrogen, hydroxy, halo, trifluoromethyl, 
  (b) C 1-6  alkylalkoxy, C 1-6  alkylamino, C 1-6  alkylthio, 
  (c) C 3-6  alkenyloxy, C 3-6  alkenylamino, C 3-6  alkenylthio, or 
  (d) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino; 
 
       with the proviso that at least one of R 2  and R 3  group be selected from [B (2)] and the phenyl and the substituents be selected from (ii)-(v) above; or R 2  and R 3  taken together forming an aryl group such as phenyl, pyridyl, in which the aryl may be optionally substituted, wherein the substituents are defined as above in (i)-(iv); 
       and R 4  is selected from the group consisting of:
  (a) hydrogen; 
  (b) substituted C 1-11  alkyl or C 2-11  alkenyl wherein the substituents are independently selected from the group consisting of:
 (i) hydrogen, hydroxy, C 1-6  alkyloxy, C 1-6 alkylthio, C 1-6  alkylamino, phenyl-C 1-6  alkylamino, C 1-6  alkoxycarbonyl; 
 (ii) substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino; and 
 (iv) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, and 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino; and 
 
  (c) aryl C 0-11  alkyl wherein the aryl group is selected from phenyl, imidazolyl, furyl, thienyl; and 
 
       a second compound effective to treat the lipid storage disease. 
     
     
         12 . The method of  claim 11 , wherein the second compound is a glucosylceramide synthase inhibitor. 
     
     
         13 . The method of  claim 12 , wherein the glucosylceramide synthase inhibitor is miglustat. 
     
     
         14 . The method of  claim 11 , wherein the second compound is an enzyme administered as enzyme replacement therapy. 
     
     
         15 . The method of  claim 11 , wherein the second compound is a pharmacological chaperone which binds to an enzyme and promotes trafficking of the enzyme from the endoplasmic reticulum to the lysosome. 
     
     
         16 . A composition comprising a glucosylceramide synthase inhibitor and a compound of Formula 1 
       
         
           
           
               
               
           
         
       
       in the form of a free compound or its pharmaceutically acceptable pro-drug, metabolite, analogue, derivative, solvate or salt wherein the substituents R 1 , R 2 , R 3 , and R 4  are defined as described in A and B below:
 (a) when R 1  is selected from the group consisting of:
 (i) substituted C 1-11  alkyl or substituted C 2-11  alkenyl, wherein the substituents are selected from the group consisting of hydroxy, C 1-6  alkyloxy; or 
 (ii) mono-, di-, and tri-substituted aryl-C 0-11  alkyl wherein aryl is selected from the group consisting of phenyl, furyl, thienyl wherein the substituents are selected from the group consisting of:
 (a) phenyl, trans-2-phenylethenyl, 2-phenylethynyl, 2-phenylethyl, wherein the said phenyl group is mono- or disubstituted with a member selected from the group consisting of hydroxy, halo, C 1-4  alkyl and C 1-4  alkyloxy, 
 (b) substituted C 1-6  alkyl, substituted C 2-6  alkyloxy, substituted C 2-6  alkylthio, substituted C 2-6  alkoxycarbonyl, wherein the substituents are selected from the group consisting of C 1-6  alkoxy, and C 1-6  alkylthio; and 
 (c) C 1-11  CO 2 R 5 , C 1-11 CONHR 5 , trans-CH═CHCO 2 R 5 , or trans-CH═CHCONHR 5  wherein R 5  is C 1-11  alkyl, or phenyl C 1-11  alkyl, C 1-6  alkoxycarbonylmethyleneoxy; 
 
 
 
       then R 2  and R 3  are each independently selected from the group consisting of mono-, di, and tri-substituted phenyl wherein the substituents are independently selected from:
 (i) substituted C 1-6  alkyl, 
 (ii) substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, 
 (iv) C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino, 
 (v) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
       wherein the substituents are selected from the group consisting of:
  (a) hydroxy, C 1-6  alkylalkoxy, C 1-6  alkylamino 
  (b) C 3-6  alkenyloxy, C3-6 alkenylamino, or 
  (c) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
       or R 2  and R 3  taken together forming an aryl group or substituted aryl, wherein the substituents are defined as above in (i)-(v); 
       and R 4  is selected from the group consisting of:
 (i) hydrogen; 
 (ii) substituted C 1-11  alkyl or C 2-11  alkenyl wherein the substituents are independently selected from the group consisting of hydrogen, hydroxy, C 1-6  alkyloxy, C 1-6 alkylthio, C 1-6  alkylamino, phenyl-C 1-6  alkylamino, C 1-6  alkoxycarbonyl; or 
 (iii) substituted aryl C 0-11  alkyl wherein the aryl group is selected from phenyl, imidazolyl, furyl, thienyl in which the substituents are selected from A(a-c); or 
 (b) when R 1  is selected from the group consisting of: 
  Mono-, di-, and tri-substituted aryl-C 0-6  alkyl wherein aryl is selected from the group consisting of phenyl, thienyl, and the substituents are selected from the group consisting of:
 (a) trans-2-substituted benzimidazolylethenyl, trans-2-substituted benzoxazolylethenyl, trans-2-substituted benzthiazolylethenyl, in which the substituents are selected from the group consisting of hydrogen, hydroxy, halo, trihalomethyl, C 1-4  alkyl and C 1-4  alkyloxy, C 1-4  alkyloxycarbonyl, C 1-4  alkylamino, di(C 1-4  alkyl)amino, C 3-6  alkenylamino, di(C 3-6  alkenyl)amino, C 1-4  alkyloxy-C 1-4  alkylamino, substituted C 1-4  alkyl and C 1-4  alkyloxy, substituted C 1-4  alkyloxycarbonyl, substituted C 1-4  alkylamino, di(substituted C 1-4  alkyl)amino, substituted C 3-6  alkenylamino, di(substituted C 3-6  alkenyl)amino, wherein the substituents are as defined above, 
 (b) trans-2-cyano ethenyl, trans-2-alkylsulfonyl ethenyl, trans-2-alkenylsulfonyl ethenyl, trans-2-substituted alkylsulfonyl ethenyl, trans-2-substituted alkenylsulfonyl ethenyl, in which the substituents are defined above, 
 (c) C 1-6  CO 2 R 5 , trans-CH═CHCO 2 R 5 , C 1-6 CONHR 5 , or trans-CH═CHCONHR 5 , wherein R 5  is C 1-6  alkoxy C 2-6  alkyl, amino C 2-6  alkyl, C 1-6  alkylamino C 2-6  alkyl, di(C 1-6  alkyl)amino C 2-6  alkyl, C 1-6  alkylthio C 2-6  alkyl, substituted C 1-6  alkoxy C 2-6  alkyl, substituted C 1-6  alkylamino C 2-6  alkyl, di(substituted C 1-6  alkyl)amino C 2-6  alkyl, substituted C 1-6  alkylthio C 2-6  alkyl, in which the substituents are selected from the group consisting of pyrrolidino, piperidino morpholino, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-C 1-6  alkylamino C 3-6  alkenyl)piperazino, imidazolyl, oxazolyl, thiazolyl, 
 (d) C 1-6 CONR 6 R 7 , or trans-CH═CHCONR 6 R 7 , wherein R 6  and R 7  are independently selected from the group consisting of C 1-6  alkyl, phenyl C 1-6  alkyl, C 1-6  alkoxycarbonylmethyleneoxy, hydroxy C 2-6  alkyl, C 1-6  alkyloxy C 2-6  alkyl, amino C 2-6  alkyl, C 1-6  alkylamino C 2-6  alkyl, di(C 1-6  alkyl)amino C 2-6  alkyl, C 1-6  alkylthio C 2-6  alkyl, substituted C 1-6  alkoxy C 2-6  alkyl, substituted C 1-6  alkylamino C 2-6  alkyl, di(substituted C 1-6  alkyl)amino C 2-6  alkyl, substituted C 1-6  alkylthio C 2-6  alkyl, wherein the substituents are selected from the group consisting of pyrrolidino, piperidino, morpholino, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-C 1-6  alkylamino C 3-6  alkenyl)piperazino, imidazolyl, oxazolyl, thiazolyl, 
 (e) R 7 C(O) C 1-6  alkyl, R 7 C(O) C 2-6  alkenyl, in which R 7  is defined as above [2(d)], 
 (f) HO—C 1-6  alkyl-C 2-6  alkenyl, R 7 —O—C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 O—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 —C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, wherein R 6  and R 7  is defined as above [2(d)], 
 (g) R 7 —O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 NH—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 6 R 7 N-C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 NH—C(O)—O—C 0-3  C 3-6  cycloalkan-1-yl, R 6 R 7 N-C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 O—C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 —C(O)—O—C 0-3  alkyl-C 3-6  cycloalkan-1-yl, R 7 O—C(O)—Co-3 alkyl-C 3-6  cycloalkan-1-yl, wherein R 7  and is defined as above [3(d)]; 
 
 
       then R 2  and R 3  are each independently selected from the group consisting of:
 (1) hydrogen, halo, trihalomethyl, C 1-6  alkyl, substituted C 1-6  alkyl, C 2-6  alkenyl, substituted C 1-6  alkenyl, C 1-6  alkyloxy, substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, C 1-6  alkylamino, substituted C 1-6  alkylamino, C 3-6  alkenylamino, substituted C 3-6  alkenylamino, 
 (2) mono-, di-, and tri-substituted phenyl wherein the substituents are independently selected from:
 (i) halo, trifluoromethyl, substituted C 1-6  alkyl, 
 (ii) C 1-6  alkyloxy, substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) C 1-6  alkyl-amino, di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino, or 
 (iv) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino, 
 
 
       wherein the substituents are selected from the group consisting of:
  (a) hydrogen, hydroxy, halo, trifluoromethyl, 
  (b) C 1-6  alkylalkoxy, C 1-6  alkylamino, C 1-6  alkylthio, 
  (c) C 3-6  alkenyloxy, C 3-6  alkenylamino, C 3-6  alkenylthio, or 
  (d) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino; 
 
       with the proviso that at least one of R 2  and R 3  group be selected from [B (2)] and the phenyl and the substituents be selected from (ii)-(v) above; or R 2  and R 3  taken together forming an aryl group such as phenyl, pyridyl, in which the aryl may be optionally substituted, wherein the substituents are defined as above in (i)-(iv); 
       and R 4  is selected from the group consisting of:
  (a) hydrogen; 
  (b) substituted C 1-11  alkyl or C 2-11  alkenyl wherein the substituents are independently selected from the group consisting of:
 (i) hydrogen, hydroxy, C 1-6  alkyloxy, C 1-6 alkylthio, C 1-6  alkylamino, phenyl-C 1-6  alkylamino, C 1-6  alkoxycarbonyl; 
 (ii) substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, substituted C 3-6  alkenyloxy, 
 (iii) di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, di(substituted C 3-6  alkenyl)amino; and 
 (iv) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, and 4-N-(C 1-6  alkylamino C 3-6  alkenyl)piperazino; and 
 
  (c) aryl C 0-11  alkyl wherein the aryl group is selected from phenyl, imidazolyl, furyl, thienyl. 
 
     
     
         17 . The composition of  claim 16 , wherein the glucosylceramide synthase inhibitor is miglustat. 
     
     
         18 . The method of  claim 1 , wherein the compound of Formula 1 is a compound wherein R 1  is selected from the group consisting of mono-, di-, and tri-substituted aryl-C 0-6  alkyl wherein aryl is selected from the group consisting of phenyl and thienyl, and the substituents are selected from the group consisting of:
 (a) C 1-6  CO 2 R 5 , trans-CH═CHCO 2 R 5 , C 1-6 CONHR 5 , or trans-CH═CHCONHR 5 ;   (b) C 1-6 CONR 6 R 7 , or trans-CH═CHCONR 6 R 7 ;   (c) R 7 C(O) C 1-6  alkyl or R 7 C(O) C 2-6  alkenyl; and   (d) HO—C 1-6  alkyl-C 2-6  alkenyl, R 7 —O—C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 O—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, or R 7 —C(O)—O—C 1-6  alkyl-C 2-6  alkenyl.   
     
     
         19 . The method of  claim 1 , wherein R 2  and R 3  are each independently selected from the group consisting of: mono-, di-, and tri-substituted phenyl wherein the substituents are independently selected from the group consisting of:
 (i) C 1-6  alkyloxy, substituted C 1-6  alkyloxy, C 3-6  alkenyloxy, or substituted C 3-6  alkenyloxy;   (ii) C 1-6  alkyl-amino, di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, or di(substituted C 3-6  alkenyl)amino, and   (iii) pyrrolidino, piperidino, morpholino, imidazolyl, substituted imidazolyl, piperazino, 4-N-C 1-6  alkylpiperazino, 4-N-C 3-6  alkenylpiperazino, 4-N-(C 1-6  alkoxy C 1-6  alkyl)piperazino, 4-N-(C 1-6  alkoxy C 3-6  alkenyl)piperazino, 4-N-(C 1-6  alkylamino C 1-6  alkyl)piperazino, or 4-N-C 1-6  alkylamino C 3-6  alkenyl)piperazino.   
     
     
         20 . The method of  claim 1 , wherein the compound of Formula 1 is a compound of Formula 1b: 
       
         
           
           
               
               
           
         
       
       wherein each instance of R a  is independently C 1-6  alkyl-amino, di(C 1-6  alkyl)amino, substituted C 1-6  alkyl-amino, di(substituted C 1-6  alkyl)amino, C 3-6  alkenyl-amino, di(C 3-6  alkenyl)amino, substituted C 3-6  alkenyl-amino, or di(substituted C 3-6  alkenyl)amino; and
 R b  is HO—C 1-6  alkyl-C 2-6  alkenyl, R 7 —O—C 1-6  alkyl-C 2-6  alkenyl, R 7 NH—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C 1-6  alkyl-C 2-6  alkenyl, R 7 NH'C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 6 R 7 N-C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, R 7 O—C(O)—O—C 1-6  alkyl-C 2-6  alkenyl, or R 7 —C(O)—O—C 1-6  alkyl-C 2-6  alkenyl.

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