Patent ID: 7282502

Claim:
A compound represented by the following structural formula: or a pharmaceutically acceptable salt thereof, wherein: Y is C═O, S(O), or S(O) 2 ; X 1 and X 2 are each independently CR; R, for each occurrence, and R 1 are each independently H, an aliphatic group, haloalkyl, aryl, arylalkyl, alkoxy, cycloalkoxy, haloalkoxy, aryloxy, arylalkoxy, alkylthio, halo, nitro, cyano, hydroxy, NR 11 CO 2 R 12 , C(O)N(R 11 ) 2 , C(O)R 12 , CO 2 R 12 , OC(O)N(R 11 ) 2 , OC(O)R 12 , N(R 11 ) 2 , or NR 11 C(O)R 12 ; wherein R 11 , for each occurrence is, independently, H or an aliphatic group, and R 12 is an aliphatic group; X 3 is CR 8 , wherein R 8 is halo, nitro, alkylcarbonyl, or trihaloalkyl; R 6 is H, an aliphatic carbonyl group, or an aliphatic ester; Ar 1 is a substituted or unsubstituted group selected from pyridyl, N-oxido pyridyl, pyrimidinyl, or pyrazinyl; and Ar 2 is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group.