Patent ID: 8044088

Claim:
A compound of general formula (II): wherein R 1 is halo or cyano; R 2 is C 1 -C 4 alkyl; R 3 is phenyl substituted with one or more substituents chosen from C 1 -C 6 alkyl, halo or —SO 2 (C 1 -C 6 alkyl); R 4 is hydrogen, C 1 -C 6 alkyl, aryl, (CH 2 ) m OC(═O)C 1 -C 6 alkyl, (CH 2 ) m N(R 5 ) 2 , or CH((CH 2 ) m O(C═O)R 6 ) 2 ; m is 1 or 2; R 5 is hydrogen or methyl; and R 6 is C 1 -C 18 alkyl; or a pharmaceutically acceptable salt thereof.