US2009054468A1PendingUtilityA1

New Use 938

Assignee: ASTRAZENECA ABPriority: Aug 23, 2007Filed: Aug 21, 2008Published: Feb 26, 2009
Est. expiryAug 23, 2027(~1 yrs left)· nominal 20-yr term from priority
A61P 43/00A61P 25/16A61P 25/14A61P 25/00A61P 25/28A61K 31/522A61K 31/5377A61K 31/519
60
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Claims

Abstract

The present invention relates to the use of MPO inhibitors for the treatment of multiple system atrophy. The present invention also relates to the use of MPO inhibitors for the treatment of Huntington's disease. The present invention also relates to the use of MPO inhibitors for neuroprotection.

Claims

exact text as granted — not AI-modified
1 - 7 . (canceled) 
   
   
       8 . A method for treating multiple system atrophy comprising administering a pharmaceutically and pharmacologically effective amount of a MPO inhibitor or a pharmaceutically acceptable salt thereof to a subject in need of such treatment. 
   
   
       9 . A method for treating Huntington's disease comprising administering a pharmaceutically and pharmacologically effective amount of a MPO inhibitor or a pharmaceutically acceptable salt thereof to a subject in need of such treatment. 
   
   
       10 . A method for neuroprotection comprising administering a pharmaceutically and pharmacologically effective amount of a MPO inhibitor or a pharmaceutically acceptable salt thereof to a subject in need of such treatment. 
   
   
       11 . The method according to  claim 8 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     1-butyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-isobutyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(pyridin-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-fluoro-benzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[2-(2-methoxyethoxy)-3-propoxybenzyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(6-ethoxy-pyridin-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-piperidin-3-ylmethyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-butyl-4-thioxo-1,3,4,5-tetrahydro-2H-pyrrolo[3,2-d]pyrimidin-2-one; 
     1-(2-isopropoxyethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-methoxy-2-methylpropyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-ethoxy-2-methylpropyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(piperidin-4-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(1-methylpiperidin-3-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[2-hydroxy-2-(4-methoxyphenyl)ethyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-methoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(3-methoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2,4-dimethoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(3-chloropyridin-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-{[3-(2-ethoxyethoxy)pyridin-2-yl]methyl}-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(6-oxo-1,6-dihydropyridin-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-3-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-benzimidazol-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-chloro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-6-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-5-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-fluoro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-imidazol-5-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-imidazol-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-chloro-1H-benzimidazol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(4,5-dimethyl-1H-benzimidazol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     7-bromo-1-isobutyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; and 
     1-(3-chlorophenyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one. 
   
   
       12 . The method according to  claim 8 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     1,3-diisobutyl-8-methyl-6-thioxanthine; 
     1,3-dibutyl-8-methyl-6-thioxanthine; 
     3-isobutyl-1,8-dimethyl-6-thioxanthine; 
     3-(2-methylbutyl)-6-thioxanthine; 
     3-isobutyl-8-methyl-6-thioxanthine; 
     3-isobutyl-2-thioxanthine; 
     3-isobutyl-2,6-dithioxanthine; 
     3-isobutyl-8-methyl-2-thioxanthine; 
     3-isobutyl-7-methyl-2-thioxanthine; 
     3-cyclohexylmethyl-2-thioxanthine; 
     3-(3-methoxypropyl)-2-thioxanthine; 
     3-cyclopropylmethyl-2-thioxanthine; 
     3-isobutyl-1-methyl-2-thioxanthine; 
     3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; 
     3-(2-methoxy-ethyl)-2-thioxanthine; 
     3-(3-(1-morpholinyl)-propyl)-2-thioxanthine; 
     3-(2-furyl-methyl)-2-thioxanthine; 
     3-(4-methoxybenzyl)-2-thioxanthine; 
     3-(4-fluorobenzyl)-2-thioxanthine; 
     3-phenethyl-2-thioxanthine;
 (+)-3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; 
 (−)-3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; and 
 
     3-n-butyl-2-thioxanthine. 
   
   
       13 . The method according to  claim 8 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     3-(pyridin-2-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(pyridin-3-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(pyridin-4-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{[3-ethoxy-4-(2-ethoxyethoxy)pyridin-2-yl]methyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(2-butyl-4-chloro-1H-imidazol-5-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(1H-benzimidazol-2-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[1-(1H-benzimidazol-2-yl)ethyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-chloro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one and 3-[(4-fluoro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-(1H-Benzimidazol-2-yl)ethyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(1H-Pyrazol-3-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-Methylpyrazin-2-yl)methyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3-Isopropylisoxazol-5-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(4-Methyl-1,2,5-oxadiazol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(6-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(4-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-(Pyridin-2-ylmethoxy)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3,5-Dimethylisoxazol-4-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(1-Methyl-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-Phenyl-2-pyridin-2-ylethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(Quinolin-4-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(6-Phenoxypyridin-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(Quinolin-4-ylmethyl)amino]ethyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-Methyl-1H-indol-3-yl)methyl]amino}ethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[Methyl(quinolin-4-ylmethyl)amino]ethyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-Aminopropyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Pyridin-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Pyridin-3-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(Pyridin-4-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(6-Chloropyridin-3-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-[2-({[6-(Trifluoromethyl)pyridin-3-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-(2-{[(4,6-Dichloropyrimidin-5-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[2-(Dimethylamino)pyrimidin-5-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(Quinolin-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Quinolin-3-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-tert-Butyl-3,5-dimethyl-1H-pyrazol-4-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(1,1-Dioxidotetrahydro-3-thienyl)-3,5-dimethyl-1H-pyrazol-4-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(1H-Benzoimidazol-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(Phenylsulfonyl)-1H-pyrrol-2-yl]methyl}amino]propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[({1-[(4-methylphenyl)sulfonyl]-1H-pyrrol-2-yl}methyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-(2-{[(1-methyl-1H-pyrrol-2-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(4-sec-Butylphenyl)-1H-pyrrol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(3-Methoxyphenyl)-1H-pyrrol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[2,5-Dimethyl-1-(1,3-thiazol-2-yl)-1H-pyrrol-3-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[4-(3-Chlorobenzoyl)-1-methyl-1H-pyrrol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(1H-Imidazol-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-Methyl-1H-imidazol-2-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(4-Bromo-1-methyl-1H-imidazol-5-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-Methyl-1H-indol-3-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     2-Thioxo-3-{2-[(1H-1,2,3-triazol-5-ylmethyl)amino]propyl}-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(Benzyloxy)-1H-imidazol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(6-Bromo-2-methylimidazo[1,2-a]pyridin-3-yl)methyl]amino}propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[({1-[2-(2-Methoxyphenoxy)ethyl]-1H-pyrrol-2-yl}methyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]pyridine-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]nicotinamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)-ethyl] isonicotinamide; 
     N-[1-methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]-1,8-naphthyridine-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]quinoline-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]pyrimidine-2-carboxamide; and 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]-1H-imidazole-2-carboxamide trifluoroaceate. 
   
   
       14 . The method according to  claim 11 , wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       15 . The method according to  claim 9 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     1-butyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-isobutyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(Pyridin-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-fluoro-benzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[2-(2-methoxyethoxy)-3-propoxybenzyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(6-ethoxy-pyridin-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-Piperidin-3-ylmethyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-butyl-4-thioxo-1,3,4,5-tetrahydro-2H-pyrrolo[3,2-d]pyrimidin-2-one; 
     1-(2-isopropoxyethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-methoxy-2-methylpropyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-ethoxy-2-methylpropyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(Piperidin-4-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(1-methylpiperidin-3-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[2-hydroxy-2-(4-methoxyphenyl)ethyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-methoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(3-methoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2,4-dimethoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(3-chloropyridin-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-{[3-(2-ethoxyethoxy)pyridin-2-yl]methyl}-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(6-oxo-1,6-dihydropyridin-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-3-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-benzimidazol-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-chloro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-6-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-5-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-fluoro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-imidazol-5-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-imidazol-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-chloro-1H-benzimidazol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(4,5-dimethyl-1H-benzimidazol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     7-bromo-1-isobutyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; and 
     1-(3-chlorophenyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one. 
   
   
       16 . The method according to  claim 10 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     1-butyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-isobutyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(pyridin-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-fluoro-benzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[2-(2-methoxyethoxy)-3-propoxybenzyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(6-ethoxy-pyridin-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-Piperidin-3-ylmethyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-butyl-4-thioxo-1,3,4,5-tetrahydro-2H-pyrrolo[3,2-d]pyrimidin-2-one; 
     1-(2-isopropoxyethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-methoxy-2-methylpropyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-ethoxy-2-methylpropyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(Piperidin-4-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(1-methylpiperidin-3-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[2-hydroxy-2-(4-methoxyphenyl)ethyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2-methoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(3-methoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(2,4-dimethoxybenzyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(3-chloropyridin-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-{[3-(2-ethoxyethoxy)pyridin-2-yl]methyl}-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(6-oxo-1,6-dihydropyridin-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-3-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-benzimidazol-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-chloro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-6-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-indol-5-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-fluoro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-imidazol-5-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-(1H-imidazol-2-ylmethyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(5-chloro-1H-benzimidazol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     1-[(4,5-dimethyl-1H-benzimidazol-2-yl)methyl]-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; 
     7-bromo-1-isobutyl-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one; and 
     1-(3-chlorophenyl)-2-thioxo-1,2,3,5-tetrahydro-pyrrolo[3,2-d]pyrimidin-4-one. 
   
   
       17 . The method according to  claim 9  wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     1,3-diisobutyl-8-methyl-6-thioxanthine; 
     1,3-dibutyl-8-methyl-6-thioxanthine; 
     3-isobutyl-1,8-dimethyl-6-thioxanthine; 
     3-(2-methylbutyl)-6-thioxanthine; 
     3-isobutyl-8-methyl-6-thioxanthine; 
     3-isobutyl-2-thioxanthine; 
     3-isobutyl-2,6-dithioxanthine; 
     3-isobutyl-8-methyl-2-thioxanthine; 
     3-isobutyl-7-methyl-2-thioxanthine; 
     3-cyclohexylmethyl-2-thioxanthine; 
     3-(3-methoxypropyl)-2-thioxanthine; 
     3-cyclopropylmethyl-2-thioxanthine; 
     3-isobutyl-1-methyl-2-thioxanthine; 
     3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; 
     3-(2-methoxy-ethyl)-2-thioxanthine; 
     3-(3-(1-morpholinyl)-propyl)-2-thioxanthine; 
     3-(2-furyl-methyl)-2-thioxanthine; 
     3-(4-methoxybenzyl)-2-thioxanthine; 
     3-(4-fluorobenzyl)-2-thioxanthine; 
     3-phenethyl-2-thioxanthine; 
     (+)-3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; 
     (−)-3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; and 
     3-n-butyl-2-thioxanthine. 
   
   
       18 . The method according to  claim 10 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     1,3-diisobutyl-8-methyl-6-thioxanthine; 
     1,3-dibutyl-8-methyl-6-thioxanthine; 
     3-isobutyl-1,8-dimethyl-6-thioxanthine; 
     3-(2-methylbutyl)-6-thioxanthine; 
     3-isobutyl-8-methyl-6-thioxanthine; 
     3-isobutyl-2-thioxanthine; 
     3-isobutyl-2,6-dithioxanthine; 
     3-isobutyl-8-methyl-2-thioxanthine; 
     3-isobutyl-7-methyl-2-thioxanthine; 
     3-cyclohexylmethyl-2-thioxanthine; 
     3-(3-methoxypropyl)-2-thioxanthine; 
     3-cyclopropylmethyl-2-thioxanthine; 
     3-isobutyl-1-methyl-2-thioxanthine; 
     3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; 
     3-(2-methoxy-ethyl)-2-thioxanthine; 
     3-(3-(1-morpholinyl)-propyl)-2-thioxanthine; 
     3-(2-furyl-methyl)-2-thioxanthine; 
     3-(4-methoxybenzyl)-2-thioxanthine; 
     3-(4-fluorobenzyl)-2-thioxanthine; 
     3-phenethyl-2-thioxanthine; 
     (+)-3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; 
     (−)-3-(2-tetrahydrofuryl-methyl)-2-thioxanthine; and 
     3-n-butyl-2-thioxanthine. 
   
   
       19 . The method according to  claim 9 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     3-(pyridin-2-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(pyridin-3-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(pyridin-4-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{[3-ethoxy-4-(2-ethoxyethoxy)pyridin-2-yl]methyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(2-butyl-4-chloro-1H-imidazol-5-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(1H-benzimidazol-2-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[1-(1H-benzimidazol-2-yl)ethyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-chloro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one and 3-[(4-fluoro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-(1H-Benzimidazol-2-yl)ethyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(1H-pyrazol-3-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-Methylpyrazin-2-yl)methyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3-Isopropylisoxazol-5-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(4-Methyl-1,2,5-oxadiazol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(6-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(4-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-(Pyridin-2-ylmethoxy)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3,5-Dimethylisoxazol-4-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(1-Methyl-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-Phenyl-2-pyridin-2-ylethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(Quinolin-4-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(6-Phenoxypyridin-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(Quinolin-4-ylmethyl)amino-]-ethyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-Methyl-1H-indol-3-yl)methyl]-amino}ethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-{2-[Methyl(quinolin-4-ylmethyl)amino]-ethyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-Aminopropyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Pyridin-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Pyridin-3-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-[(Pyridin-4-ylmethyl)amino]propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(6-Chloropyridin-3-yl)methyl]-amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one trifluoroacetate; 
     3-[2-({[6-(Trifluoromethyl)pyridin-3-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-(2-[{(4,6-Dichloropyrimidin-5-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-({[2-(Dimethylamino)pyrimidin-5-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-{2-[(Quinolin-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Quinolin-3-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-tert-Butyl-3,5-dimethyl-1H-pyrazol-4-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(1,1-Dioxidotetrahydro-3-thienyl)-3,5-dimethyl-1H-pyrazol-4-yl]-methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(1H-Benzoimidazol-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-[2-({[1-(Phenylsulfonyl)-1H-pyrrol-2-yl]-methyl}amino]-propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[({1-[(4-methylphenyl)sulfonyl]-1H-pyrrol-2-yl}methyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-(2-{[(1-methyl-1H-pyrrol-2-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-{[(1-(4-sec-Butylphenyl)-1H-pyrrol-2-yl]methyl}amino)propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-{[(1-(3-Methoxyphenyl)-1H-pyrrol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[2,5-Dimethyl-1-(1,3-thiazol-2-yl)-1H-pyrrol-3-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[4-(3-Chlorobenzoyl)-1-methyl-1H-pyrrol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-[(1H-Imidazol-2-ylmethyl)amino]propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-{[(1-Methyl-1H-imidazol-2-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-{[(4-Bromo-1-methyl-1H-imidazol-5-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-Methyl-1H-indol-3-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     2-Thioxo-3-[2-[(1H-1,2,3-triazol-5-ylmethyl)amino]propyl]-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-{[(1-(Benzyloxy)-1H-imidazol-2-yl]methyl]amino)propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-{[(6-Bromo-2-methylimidazo[1,2-a]pyridin-3-yl)methyl]amino}propyl-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-[({1-[2-(2-Methoxyphenoxy)ethyl]-1H-pyrrol-2-yl]methyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]pyridine-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]nicotinamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)-ethyl]isonicotinamide; 
     N-[1-methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]-1,8-naphthyridine-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]quinoline-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]pyrimidine-2-carboxamide; and 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]-1H-imidazole-2-carboxamide trifluoroaceate. 
   
   
       20 . The method according to  claim 10 , wherein said MPO inhibitor or pharmaceutically acceptable salt thereof is selected from: 
     3-(pyridin-2-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(pyridin-3-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(pyridin-4-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{[3-ethoxy-4-(2-ethoxyethoxy)pyridin-2-yl]methyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-fluoro-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(2-butyl-4-chloro-1H-imidazol-5-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(1H-benzimidazol-2-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[1-(1H-benzimidazol-2-yl)ethyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-chloro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one and 3-[(4-fluoro-1H-indol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-(1H-Benzimidazol-2-yl)ethyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(1H-Pyrazol-3-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(5-Methylpyrazin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3-Isopropylisoxazol-5-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(4-Methyl-1,2,5-oxadiazol-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(6-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(4-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3-Butoxypyridin-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-(Pyridin-2-ylmethoxy)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(3,5-Dimethylisoxazol-4-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(1-Methyl-1H-indol-2-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-Phenyl-2-pyridin-2-ylethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(Quinolin-4-ylmethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[(6-Phenoxypyridin-3-yl)methyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(Quinolin-4-ylmethyl)amino]-ethyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-Methyl-1H-indol-3-yl)methyl]-amino}ethyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-{2-[Methyl(quinolin-4-ylmethyl)amino]ethyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-Aminopropyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Pyridin-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[(Pyridin-3-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(Pyridin-4-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(6-Chloropyridin-3-yl)methyl]amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one trifluoroacetate; 
     3-[2-({[6-(Trifluoromethyl)pyridin-3-yl]methyl]amino)propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one trifluoroacetate; 
     3-(2-[{(4,6-Dichloro pyrimidin-5-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-[2-({[2-(Dimethylamino)pyrimidin-5-yl]methyl]amino)propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-[2-{(Quinolin-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-[2-{(Quinolin-3-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-tert-Butyl-3,5-dimethyl-1H-pyrazol-4-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(1,1-Dioxidotetrahydro-3-thienyl)-3,5-dimethyl-1H-pyrazol-4-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(1H-Benzoimidazol-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-[2-({[1-(Phenylsulfonyl)-1H-pyrrol-2-yl]methylamino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-{2-[({1-[(4-methylphenyl)sulfonyl]-1H-pyrrol-2-yl}methyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one trifluoroacetate; 
     3-(2-{[(1-methyl-1H-pyrrol-2-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(4-sec-Butylphenyl)-1H-pyrrol-2-yl]methyl}amino)propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(3-Methoxyphenyl)-1H-pyrrol-2-yl]methyl]amino)propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[2,5-Dimethyl-1-(1,3-thiazol-2-yl)-1H-pyrrol-3-yl]methyl]amino)propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[4-(3-Chlorobenzoyl)-1-methyl-1H-pyrrol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[(1H-Imidazol-2-ylmethyl)amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-{[(1-Methyl-1H-imidazol-2-yl)methyl]amino]propyl}-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-{[(4-Bromo-1-methyl-1H-imidazol-5-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-(2-{[(1-Methyl-1H-indol-3-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     2-Thioxo-3-{2-[(1H-1,2,3-triazol-5-ylmethyl)amino]propyl}-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-[2-({[1-(Benzyloxy)-1H-imidazol-2-yl]methyl}amino)propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-Purin-6-one; 
     3-(2-{[(6-Bromo-2-methylimidazo[1,2-a]pyridin-3-yl)methyl]amino}propyl)-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     3-{2-[({1-[2-(2-Methoxyphenoxy)ethyl]-1H-pyrrol-2-yl}methyl)amino]propyl]-2-thioxo-1,2,3,7-tetrahydro-6H-purin-6-one; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]pyridine-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]nicotinamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)-ethyl]isonicotinamide; 
     N-[1-methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]-1,8-naphthyridine-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]quinoline-2-carboxamide; 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]pyrimidine-2-carboxamide; and 
     N-[1-Methyl-2-(6-oxo-2-thioxo-1,2,6,7-tetrahydro-3H-purin-3-yl)ethyl]-1H-imidazole-2-carboxamide trifluoroacetate. 
   
   
       21 . The method according to  claim 12 , wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       22 . The method according to  claim 13 , wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       23 . The method according to  claim 15  wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       24 . The method according to  claim 16 , wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       25 . The method according to  claim 17  wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       26 . The method according to  claim 18 , wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       27 . The method according to  claim 19  wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg. 
   
   
       28 . The method according to  claim 20 , wherein the daily dose of the MPO inhibitor or the pharmaceutically acceptable salt thereof is within the range of from 1 to 1 000 mg.

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