| 摘要 |
A compound of formula (I) in which R<1> is substituted heterocyclic-(lower)alkyl, and R<2> is hydrogen, halogen, nitro, amino, protected amino, hydroxyamino, lower alkyl, hydroxy, protected hydroxy, sulfamoyl, carboxy, protected carboxy, mercapto, optionally substituted heterocyclic-carbonyl, optionally substituted heterocyclic-(lower)alkyl, lower alkylthio, hydroxy(lower)alkyl or protected hydroxy(lower)alkyl, R<3> is aryl which may have suitable substituent(s), and A is lower alkylene, or pharmaceutically acceptable salts thereof, useful as a dopamine receptor agonist, 5-HT receptor antagonist or alpha 1 receptor antagonist. |
