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