Patent ID: 7517991

Claim:
A compound according to Formula I and pharmaceutically acceptable salts and stereoisomers thereof, wherein: X is selected from the group consisting of —C(O)— and —S(O) 2 —; Y is —CH 2 —; R 1 is alkyl; R 2 is selected from the group consisting of phenylalkyl and phenylalkenyl each of which is optionally substituted by halo or alkoxy; R 3 is hydrogen; and R 4 is selected from the group consisting of cyclohexyl, phenyl, and naphthyl, wherein (i) the phenyl and naphthyl are each mono- or di- substituted; and (ii) R 4 is substituted at the 2, the 3 or the 2 and 3 position when R 4 is phenyl; and wherein the substitutents for each of R 1 and R 4 are independently selected from the group consisting of hydrogen, halo, cyano, nitro, alkyl, alkenyl, CO 2 alkyl, alkoxy, phenyl, phenoxy, trifluoromethoxy and CF 3 .