5-[Hydroxy-2-(substituted-amino)]ethyl-8-hydroxy-carbostyril derivatives represented by the formula (I) ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aralkyl group containing a straight or branched chain alkyl moiety having 1 to 4 carbon atoms or a cycloalkyl group having 4 to 6 carbon atoms, or R.sup.1 and R.sup.2 may, when taken together with the nitrogen atom to which they are attached, form a 5 or 6-membered substituted or unsubstituted heterocyclic ring containing 1 or 2 nitrogen, oxygen or sulfur atoms as hetero atoms, the pharmaceutically acceptable acid addition salts thereof and a process for preparing the above compounds.
化合物(I)的结构式为:5-[羟基-2-(取代
氨基)]乙基-8-羟基-羧色素衍
生物,其中R1和R2可以相同也可以不同,分别表示氢原子,含1至4个碳原子的烷基,含有1至4个碳原子的直链或支链烷基的芳基烷基或含有4至6个碳原子的环烷基,或者当它们与所连接的氮原子一起形成1个或2个氮、氧或
硫原子的取代或未取代的5或6元杂环环时,R1和R2可以结合在一起。所述化合物的药物可接受的酸加盐以及制备上述化合物的方法。