Patent ID: 6984657

Claim:
A compound of the formula (I): wherein: R 1 is hydrogen, halo, methyl, ethyl, or methoxy; R 2 is hydrogen, halo, methyl, ethyl, or methoxy; R 3 is a halo group, lower alkyl, lower alkenyl, lower alkynyl, alkoxy, trifluoromethyl, nitro, cyano, trifluoromethoxy, C(O)R 7 , or S(O) n R 7 where n is 0, 1, or 2 and R 7 is an alkyl group; R 4 is a halo, trifluoromethyl, methylthio, methoxy, trifluoromethoxy, lower alkyl, lower alkenyl, or lower alkynyl; R 5 is hydrogen, halo, cyano, lower alkyl, lower alkenyl, lower alkynyl, or COR 8 where R 8 is lower alkyl; and R 6 is hydrogen, halo, lower alkyl, lower alkenyl, lower alkynyl, or COR 9 where R 9 is lower alkyl; provided that when R 1 is hydrogen, halo, or methoxy; R 2 is hydrogen, halo, methyl, ethyl, or methoxy; and R 5 and R 6 are both hydrogen; then a) when one of R 3 or R 4 is chloro, fluoro, or trifluoromethyl, then the other is not halo or trifluoromethyl; b) when one of R 3 or R 4 is chloro, the other is not methyl; and c) when R 3 is trifluoromethyl, R 4 is not methyl; or a pharmaceutically acceptable salt or prodrug thereof.