Patent ID: 7709507

Claim:
A compound of the formula or a pharmaceutically acceptable salt thereof, a tautomer thereof, or a prodrug thereof; wherein A is cycloalkyl, aryl, or heteroaryl; A is a five-membered or six-membered monocyclic ring or a fused bicyclic thereof; A is substituted or unsubstituted; and if A is substituted, it has one or more stable substituents consisting of C, N, O, S, P, F, Cl, Br, and H; and each substituent has 1, 2, 3, or 4 atoms which are not hydrogen; and B is aryl or heteroaryl, B is a five-membered or six-membered monocyclic ring or a fused bicyclic thereof; B is substituted or unsubstituted; and if B is substituted, it has one or more stable substituents consisting of C, N, O, S, P, F, Cl, Br, and H; and each substituent has 1, 2, 3, or 4 atoms which are not hydrogen.