| abstract |
A compound of the formula (I): n n n wherein R 1 is lower alkyl which is optionally substituted with n halogen, cyano, n N,N-di(lower)alkylcarbamoyl, n phenyl optionally substituted with halogen, or heterocyclic group, n cyclo(lower)alkyl, n lower alkynyl, or n N,N-di(lower)alkylcarbamoyl; n R 2 is lower alkyl, lower alkoxy, cyano, or 1H-pyrrol-1-yl; n R 3 is lower alkyl, lower alkoxy, or cyano; n X is O, S, SO or SO 2 ; n Y and Z are each CH or N; and n m is 0 or 1; n or salts thereof, which are useful as a medicament. |