Patent ID: 7745433

Claim:
A compound of the formula I: wherein R 1 is C 1 -C 4 branched or straight chain alkyl; R 2 is H; R 3 is H; C 1 -C 6 branched or straight chain alkyl; C 2 -C 4 alkenyl; or C 2 -C 4 alkynyl; R 4 is H; C 1 -C 6 branched or straight chain alkyl; or C 2 -C 4 alkenyl; R 5 is SO 2 NR 10 R 11 ; R 8 is H; or C 1 -C 6 branched or straight chain alkyl; R 10 and R 11 are each independently H; C 1 -C 12 branched or straight chain alkyl; C 1 -C 3 halogenated branched or straight chain alkyl; C 2 -C 6 alkenyl; C 2 -C 6 alkynyl or C 3 -C 6 cycloalkyl; or R 10 and R 11 together with their attached nitrogen atom form a pyrrolinyl, pyrrolinone group, piperidyl, morpholinyl, or 4-N(R 8 )-piperazinyl; the said groups are optionally substituted with OH, CN, CO 2 R 8 , C 1 -C 4 branched or straight chain alkyl, or C 1 -C 3 alkoxyl; or their pharmaceutically acceptable salts.