Patent ID: 8883850

Claim:
Compound of formula (I): wherein R 1 is selected from the group consisting of (1) hydrogen, (2) —R 3 , (3) —C 1-6 alkyl, (4) —C 2-6 alkenyl, and (5) —C(O)N(R 4 ) 2 , wherein each is optionally substituted with one or more R a ; R 2 is selected from the group consisting of (1) hydroxyl, and (2) —N(R 4 ) 2 , wherein each is optionally substituted with one or more R a ; R 3 and R 4 are independently selected from the group consisting of (1) hydrogen, (2) hydroxyl, (3) —C 1-6 alkyl, (4) —C 3-10 cycloalkyl, and (5) —C 5-10 heterocyclyl, wherein each is optionally substituted with one or more R a ; A is selected from the group consisting of (1) —C 6-10 aryl, and (2) —C 6-10 heteroaryl, wherein each is optionally substituted with one or more R a ; R a is selected from the group consisting of (1) hydrogen, (2) hydroxyl, (3) halogen, (4) —O, (5) —C 1-6 alkyl, (6) —C 3-10 cycloalkyl, which is unsubstituted or substituted with one or more hydroxyl, (7) —C 5-10 heteroaryl, which is unsubstituted or substituted with one or more hydroxyl, (8) —CN, (9) —OR 3 , (10) —SR 3 , (11) —N(R 4 ) n , and (12) —C(O)R 3 O(C)O; n is independently 1 to 4; or a pharmaceutically acceptable salt thereof, provided R 1 is not hydrogen when A is phenyl and R 2 is hydroxyl.