Patent ID: 8518957

Claim:
A compound of the formula (I): wherein A is hydrogen or —CONHR 1 , R 1 is selected from the group consisting of hydrogen, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, C 2 -C 6 alkynyl, C 3 -C 8 cycloalkyl, and C 6 -C 10 aryl, R 2 is a phenyl group optionally substituted with one or more halogen atoms, a is an integer of 2 to 10, R 3 is selected from the group consisting of phenyl optionally substituted with 1, 2, 3, 4, or 5 substituents selected from the group consisting of halogen, NO 2 , NR 4 R 5 , COOH, COR 6 , C 1 -C 6 alkyl, C 3 -C 8 cycloalkyl, adamantyl, C 6 -C 10 aryl, isothiocyanato, heteroaryl, and heterocyclyl; benzyl optionally substituted with 1, 2, 3, 4, or 5 substituents selected from the group consisting of halogen, NO 2 , NR 4 R 5 , COR 6 , C 1 -C 6 alkyl, C 3 -C 8 cycloalkyl, adamantyl, C 6 -C 10 aryl, heteroaryl, and heterocyclyl, R 4 and R 5 are independently hydrogen or C 1 -C 6 alkyl, and R 6 is C 1 -C 6 alkyl optionally substituted with halogen, or a pharmaceutically acceptable salt thereof.