Patent ID: 8541431

Claim:
A compound of the formula: wherein X is selected from the group consisting of cycloalkyl, cycloalkylalkyl, aryl, heteroaryl, heteroarylalkyl, heterocycloalkyl, and heterocycloalkylalkyl, wherein the ring portion of each is optionally substituted independently with one, two, three, four or five substituents selected from the group consisting of halo, alkyl, alkoxy, hydroxyl, cyano, nitro, amino, alkylamino, dialkylamino, thiol, alkylthiol, and haloalkyl; Y is selected from the group consisting of CH 2 , CH(CH 3 ), CH(OH), C(CH 3 )(OH), C(CH 3 ) 2 , C(—U(CH 2 ) n U—), C(O), S(O), and S(O) 2 ; n is an integer from 1 to 3; U is selected from the group consisting of CH 2 , S, and O; Z is selected from the group consisting of C 3 -C 20 alkyl optionally substituted with a substituent selected from the group consisting of halo, alkyl, alkoxy, hydroxyl, cyano, nitro, amino, alkylamino, dialkylamino, thiol, alkylthiol, and haloalkyl; cycloalkyl, cycloalkylalkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, heterocycloalkyl, and heterocycloalkylalkyl, wherein the ring portion of each is optionally substituted independently with one, two, three, four or five substituents selected from the group consisting of halo, alkyl, alkoxy, hydroxyl, cyano, nitro, amino, alkylamino, dialkylamino, thiol, alkylthiol, and haloalkyl; and R 1 and R 2 are independently selected from the group consisting of H and alkyl.