Patent ID: 7056953

Claim:
A pharmaceutical composition comprising a pharmaceutically acceptable carrier and a compound of the formula: wherein: R 1 , R 2 , R 3 , and R 4 are independently selected from the group consisting of hydrogen, fluoro, chloro, bromo, C1–C6 alkyl, C1–C6 alkoxy, nitro, cyano and trifluoromethyl, with the proviso that: (a) R 1 , R 2 , and R 3 may not all be hydrogen when R 4 is 2-chloro or 4-chloro; (b) when R 1 and R 3 are hydrogen and R 2 is 4-bromo or 4-chloro, then R 4 may not be 4-chloro, 4-fluoro or 4-bromo; (c) when R 1 and R 3 are hydrogen and R 2 is 4-fluoro, then R 4 may not be 4-fluoro or 4-bromo; (d) when R 1 is hydrogen, and R 4 is 2-fluoro, then R 2 and R 3 may not be 4-fluoro; and (e) when R 1 is hydrogen and R 3 is 4-hydrogen, 4-chloro, 4-bromo, 4-methyl or 4-methoxy, and R 4 is 2-hydrogen, 2-chloro, or 2-fluoro, then R 2 may not be 4-hydrogen, 4-chloro, 4-fluoro, or 4-bromo.