Patent ID: 7196093

Claim:
A compound or a pharmaceutically acceptable salt thereof, having the formula (IA): wherein R1 and R2 are the same or different, and are selected from the group consisting of hydrogen, hydroxy, unsubstituted alkyl, substituted alkyl, cycloalkyl, alkenyl, alkoxy, amino, aryl, heteroaryl, and halogen; R3 and R4 are the same or different and are selected from the group consisting of hydrogen, unsubstituted alkyl, substituted alkyl, acetyl, alkenyl, aryl, and heteroaryl; X is selected from the group consisting of oxygen, —NH, and sulfur; and Y is selected from the group consisting of a C 1-10 unsubstituted alkyl group, a C 1-10 substituted alkyl group, alkenyl, vinyl, aryl, and heteroaryl, or formula (IB): wherein R5 is cycloalkyl, alkenyl or heteroaryl; R6 is alkenyl or heteroaryl; R7 and R8 are the same or different and are selected from the group consisting of hydrogen, unsubstituted alkyl, substituted alkyl, acetyl, alkenyl, aryl, and heteroaryl; V is oxygen, —NH or sulfur; and W is hydrogen, C 1-10 unsubstituted alkyl, C 1-10 substituted alkyl, alkenyl, vinyl, aryl, or heteroaryl.