Patent ID: 8114872

Claim:
A compound of the formula: wherein: R 1 is hydrogen, methyl, cyclopropyl, cyclopropylamino(C 1 -C 2 alkyl), fluoro, ethoxy, hydroxy, 1-(hydroxy)ethyl, 2-(hydroxy)(C 2 -C 3 alkoxy), 2-(hydroxy)ethoxymethyl, 1-(chloro)ethyl, 1-((2-fluoro)ethylamino)ethyl, 2-(methylamino)ethoxy, (2-hydroxyethyl)amino, (2-hydroxyethyl)amino(C 1 -C 2 alkyl), amino, amino(C 1 -C 4 alkyl), amino(C 2 -C 3 alkoxy), aminocarbonylmethyl, (1-methyl)-(1-aminocarbonyl)ethyl, (C 1 -C 3 alkyl)amino(C 1 -C 2 alkyl), methoxyethylamino, N—(C 1 -C 3 alkyl)-N-methyl-amino(C 1 -C 2 alkyl), pyrrolidin-1-yl-methyl, 3-(dimethylamino)-pyrrolidin-1-yl-methyl, 3-(pyrid-3-yl)-pyrrolidin-1-yl-methyl, 3-(amino)pyrrolidin-1-yl-methyl, 3-(methylamino)pyrrolidin-1-yl-methyl, (4,4-dimethyloxalidin-3-yl)methyl, [N-(2-hydroxy)ethyl-N-methyl]-aminomethyl, (azetidin-1-yl)methyl, piperidin-1-yl-methyl, 4-(methoxy)piperidin-1-yl-methyl, 4-(hydroxy)piperidin-1-yl-methyl, 4-(hydroxymethyl)piperidin-1-yl-methyl, piperazin-1-yl-(C 1 -C 2 alkyl), 4-(methyl)piperazin-1-yl-methyl, 3,5-(dimethyl)piperazin-1-yl-methyl, or morpholin-4-yl-methyl; R 2 is hydrogen; R 3 is hydrogen, methyl, fluoro, or chloro, or R 3 is amino and together with R 2 forms a pyrrolyl ring fused to the pyridine; R 4 is hydrogen, methyl, fluoro, or chloro; R 5 is hydrogen or hydroxymethyl; and R 6 is hydrogen or methyl; or a pharmaceutically acceptable salt thereof.