Patent ID: 7230011

Claim:
A compound of the formula wherein R is hydrogen, C 1 -C 6 alkyl, or C 3 -C 6 cycloalkyl; which C 1 -C 6 alkyl is unsubstituted or is substituted with 1 or 2 substituents selected from the group consisting of C 3 -C 6 cycloalkyl, phenyl, substituted phenyl, pyridyl, and trifluoromethyl; which phenyl is unsubstituted or is substituted with 1 to 3 groups independently selected from the group consisting of hydrogen, C 1 -C 6 alkyl, C 1 -C 6 alkoxy, halogen, cyano, trifluoromethyl, nitro, and phenyl; R 1 is hydrogen or C 1 -C 3 alkyl R 2 is hydrogen or C 1 -C 6 alkyl; R 3 is hydrogen or halo; R 4 is hydrogen, C 1 -C 6 alkyl, vinyl, allyl, C 2 -C 6 alkynyl, or halo; X is 1 to 3 substituents independently selected from the group consisting of hydrogen, halo, C 1 -C 6 alkyl, C 1 -C 6 alkoxy, nitro, amino, C 1 -C 6 alkylsulfonylamino, and cyano, or X is 5 halo substituents; represents either a single or a double bond; or a pharmaceutically acceptable addition salt thereof.