Phenoxyethylamine derivatives represented by the general formula (I): ##STR1## wherein R.sub.1 and R.sub.5 represent lower-alkyl, R.sub.2 and R.sub.3, which may be the same or different, each represents hydrogen or lower-alkyl, or ##STR2## represents a 5- or 6-membered ring system which may include nitrogen, oxygen or sulfur as a ring membered atom, R.sub.4 represents hydrogen or lower-alkyl, and n represents an integer selected from 1 to 3, their optical isomers and pharmacologically-acceptable acid addition salts, which exhibit excellent .alpha..sub.1 -blocking activity, a process for their preparation, pharmaceutical compositions thereof, and a method for the treatment of a subject afflicted with hypertension or dysuria by administrating such a compound, are all disclosed.
                            本发明揭示了一种由通式(I)表示的苯氧
乙胺衍
生物:##STR1## 其中R.sub.1和R.sub.5表示较低的烷基,R.sub.2和R.sub.3,可以相同或不同,每个表示氢或较低的烷基,或##STR2##表示一个5-或6-成员环系,其中可以包括氮、氧或
硫作为环成员原子,R.sub.4表示氢或较低的烷基,n表示选择从1到3的整数,其光学异构体和药理学上可接受的酸加盐,表现出优异的α.sub.1-阻断活性,其制备方法,制药组合物以及通过管理此类化合物治疗患有高血压或排尿困难的受试者的方法。