Patent ID: 8163914

Claim:
A compound of formula (I) wherein Y 1 is A is aryl, heteroaryl, cycloalkyl, cycloalkenyl, arylalkyl, heteroarylalkyl, heterocyclealkyl, cycloalkylalkyl, or cycloalkenylalkyl wherein the aryl, heteroaryl, cycloalkyl, cycloalkenyl, the aryl moiety of arylalkyl, the heteroaryl moiety of the heteroarylalkyl, the heterocycle moiety of the heterocyclealkyl, the cycloalkyl moiety of the cycloalkylalkyl, and the cycloalkenyl moiety of the cycloalkenylalkyl are each independently unsubstituted or substituted, wherein if A is a bicyclic aryl or bicyclic heteroaryl, the bicyclic aryl or bicyclic heteroaryl is selected from the group consisting of dihydroindenyl, indenyl, naphthyl, dihydronaphthalenyl, tetrahydronaphthalenyl, and quinolin; and Y 2 is hydrogen or alkyl, or a pharmaceutically acceptable salt thereof.