Patent ID: 7381728

Claim:
A compound of formula (I): in which R a is aryl or heteroaryl; Y is a single bond, CH 2 , CH 2 CH 2 , or CH═CH; R b is hydrogen or C 1-6 alkyl; R c is hydrogen or methyl; R d is C 1-6 alkyl; R e is hydrogen, C 1-6 alkyl, C 3-6 cycloalkyl, COC 1-6 alkyl, C 1-6 alkoxy, halogen, hydroxyl, trifluoromethyl, trifluoromethoxy or cyano; and R f is hydrogen, C 1-6 alkyl, C 3-6 cycloalkyl, COC 1-6 alkyl, C 1-6 alkoxy, C 1-6 alkoxy, C 1-6 alkyl, halogen, hydroxyl, trifluoromethyl, or cyano; or a pharmaceutically acceptable salt thereof.