| abstract |
A compound of the formula (I): n wherein: n R 1 is chlorine, difluoromethyl, trifluoromethyl or cyano; and n R 2 is a group having the formula: n  wherein: n X is halogen, cyano, nitro or amino; n Y 1 is lower alkyl or lower alkoxy; and n Z is halogen; n or a pharmaceutically acceptable salt thereof. |