Patent ID: 8124602

Claim:
A compound of formula V(A): or a pharmaceutically acceptable salt thereof, wherein R 2 b is H, halo, cyano, nitro, (C 1 -C 6 )alkanoyl, carboxy, (C 1 -C 6 )alkoxycarbonyl, (C 1 -C 6 )alkyl, hydroxy, halo(C 1 -C 6 )alkyl, halo(C 1 -C 6 )alkoxy, (C 1 -C 6 )alkoxy, NHCO—(C 1 -C 6 )alkyl, SO 2 (C 1 -C 6 )alkyl, SO 2 NH(C 1 -C 6 )alkyl, or SO 2 N((C 1 -C 6 )alkyl) 2 ; Z is CH or N when “- - - -” is a bond, or, when “- - - -” is absent, Z is O or NH; Ry is fluoro, hydroxy, methoxy, carbomethoxy, or carboxy; R′ is H or (C 1 -C 6 )alkyl; and R is