Patent ID: 8138177

Claim:
A compound of the formula (I): or a pharmaceutically acceptable salt thereof, wherein: A is a carbon atom; B is a carbon atom; R 1 is a C 1 -C 4 alkyl group substituted with 1 to 3 substituents independently selected from the group consisting of a C 1 -C 4 alkyl group, a hydroxy group, a C 1 -C 4 alkoxy group, a mercapto group, a C 1 -C 4 alkylthio group, a C 1 -C 4 alkylsulfinyl group, a C 1 -C 4 alkylsulfonyl group, an amino group, a C 1 -C 4 alkylamino group, a di(C 1 -C 4 alkyl)amino group, a (C 1 -C 4 alkyl)(C 1 -C 4 alkylsulfonyl)amino group, a cycloalkyl group, and a heterocyclyl group; wherein the cycloalkyl group is optionally substituted with 1 to 3 substituents selected from the group consisting of a hydroxy group, a C 1 -C 4 alkoxy group and a C 1 -C 4 alkyl group; and wherein the heterocyclyl group is optionally substituted with 1 to 3 substituents selected from the group consisting of a hydroxy group, a C 1 -C 4 alkoxy group and a C 1 -C 4 alkyl group; R 2 is selected from the group consisting of a cycloalkyl group, a C 6 -C 10 aryl group, and a C 1 -C 10 alkyl group; wherein the cycloalkyl group is optionally substituted with 1 to 4 substituents selected from the group consisting of a hydroxy group, a C 1 -C 4 hydroxyalkyl group, a C 1 -C 4 alkoxy group, a C 6 -C 10 aryloxy group, a mercapto group, a C 1 -C 4 alkylthio group, a C 6 -C 10 arylthio group, a carboxy group, a C 1 -C 4 alkoxycarbonyl group, a C 1 -C 4 alkyl group, a C 2 -C 4 alkenyl group and a C 2 -C 4 alkynyl group; wherein the C 6 -C 10 aryl group is optionally substituted with 1 to 3 substituents selected from the group consisting of a hydroxy group and a C 1 -C 4 alkyl group; and wherein the C 1 -C 10 alkyl group is optionally substituted with 1 to 3 substituents independently selected from the group consisting of a cyano group, a hydroxy group, a trifluoromethyl group, a C 2 -C 4 alkenyl group, a C 2 -C 4 alkynyl group, a C 1 -C 4 alkoxy group, a C 6 -C 10 aryloxy group, a mercapto group, a C 1 -C 4 alkylthio group, a C 1 -C 4 alkylsulfinyl group, a C 1 -C 4 alkylsulfonyl group, a C 1 -C 4 alkyisulfonylamino group, a C 6 -C 10 arylthio group, a carboxy group, a C 1 -C 4 alkyl-carbonyl group, a trifluoromethyl-carbonyl group, a C 1 -C 4 alkoxy carbonyl group, an amino carbonyl group, a C 1 -C 4 alkylamino-carbonyl group, a C 1 -C 4 hydroxyalkylamino-carbonyl group, a di(C 1 -C 4 alkyl)amino-carbonyl group, a (C 1 -C 4 hydroxyalkyl)(C 1 -C 4 alkyl)amino-carbonyl group, a cycloalkyl group, and a C 6 -C 10 aryl group; and R 3 is a hydrogen atom, a halogen atom, a hydroxy group, a C 1 -C 4 alkyl group, C 1 -C 4 haloalkyl group or a C 1 -C 4 alkoxy group.