Patent ID: 7642273

Claim:
A compound having the structure of the formula (IA): or a stereoisomer thereof, a tautomer thereof, or a pharmaceutically acceptable salt thereof, wherein: R is C 1-4 alkyl; Z is a cycloalkyl, aryl, or heteroaryl ring, where each ring is substituted by one to three groups selected from R 3 ; R 3 is independently at each occurrence (i) H or halo; or (ii) alkyl, alkenyl, OR 5 , aryl, and heteroaryl, each group of which is substituted by one to two groups selected from R 4 ; R 4 is H, phenyl, S(O) 2 R 5 , NHC(O)R 5 , or N(R 5 ) 2 ; R 5 is independently at each occurrence H or C 1-4 alkyl; and R b is cyano or nitro.