Phenethylamine derivatives shown by the general formula ##STR1## wherein Ro represents a lower alkyl group; R.sub.1 represents a lower alkyl group or a lower alkoxy group, R.sub.2 represents hydrogen atom or a hydroxyl group; R.sub.3 and R.sub.4 each represents hydrogen atom or a lower alkyl group; R.sub.5 represents hydrogen atom or a lower alkoxy group; X represents oxygen atom or a methylene group; m is an integer of 1-3; and n is an integer of 0-2 and the acid addition salts thereof. These compounds exhibit a strong .alpha.-adrenergic blocking action and are useful as an antihypertensive agent.
                            通式为##STR1##的苯
乙胺衍
生物,其中Ro代表较低的烷基;R.sub.1代表较低的烷基或较低的烷氧基,R.sub.2代表氢原子或羟基;R.sub.3和R.sub.4各代表氢原子或较低的烷基;R.sub.5代表氢原子或较低的烷氧基;X代表氧原子或亚甲基;m为1-3的整数;n为0-2的整数,以及它们的酸加成盐。这些化合物表现出强烈的α-
肾上腺素受体阻滞作用,可用作降压药物。