Patent ID: 7659272

Claim:
A compound represented by the following structural formula: or a pharmaceutically acceptable salts thereof, wherein: Y is C═O, S(O), or S(O) 2 ; one of X 1 , X 2 , or X 3 is N, and the other two are 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; R 6 is H, an aliphatic carbonyl group, or an aliphatic ester; Ar 1 is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group; and Ar 2 is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, provided that the compound is other than N-(3-benzoyl-6-ethyl-2-methyl-4-pyridinyt)-4-methyl- benzenesulfonamide.