5-\x9b1-Hydroxy-2-(heterocyclic-amino)!alkyl-8-hydroxy-3,4-dihydrocarbostyril \n' derivatives having the formula (I) ##STR1## wherein R.sup.1 represents an alkyl group having 1 to 4 carbon atoms and A, when taken together with the nitrogen atom to which it is attached, form a 5- or 6-membered substituted or unsubstituted heterocyclic ring containing 1 or 2 nitrogen, or oxygen atoms as hetero atoms, the pharmaceutically acceptable acid addition salts thereof, and a process for preparing the same.
具有以下式子(I)的5-\x9b1-羟基-2-(杂环
氨基)!烷基-8-羟基-3,4-二氢咔啉衍
生物:
##STR1##
其中,R.sup.1代表1至4个碳原子的烷基,A与其连接的氮原子共同形成一个含有1或2个氮或氧原子的5-或6-成员取代或未取代的杂环环,其药学上可接受的酸加盐,以及制备它们的过程。