| 摘要 |
A compound of the formula : <CHEM> wherein R<1> is hydrogen, lower alkyl, halo(lower)alkyl, halogen, aryl which may have suitable substituent(s), heterocyclic group, amino which may be substituted by suitable substituent(s) or N,N-di(lower)alkylamino(lower)alkyl, R<2> is hydrogen, lower alkyl or N-[nitrooxy(lower)alkyl]carbamoyl, X is -O- or -S-, Y is a single bond, lower alkylene or lower alkenylene, and Z is lower alkylene which may be substituted by suitable substituent(s) or lower alkyleneoxy(lower)alkylene, and pharmaceutically acceptable salts thereof, which have vasodilating activities, to process for the preparation thereof, and to a pharmaceutical composition comprising the same for therapeutical treatment of cardiovascular disorder in human being. |
