The present invention relates to 3,4-disubstituted phenylethanolaminotetralincarboxamide derivatives represented by the general formula: ##STR1## (wherein A represents a lower alkylene group; B represents an amino group, a di(lower alkyl)amino group or a 3 to 7-membered alicyclic amino group which may contain an oxygen atom in the ring; n is an integer of 1 or 2; the carbon atom marked with * represents a carbon atom in R configuration, S configuration or a mixture thereof; and the carbon atom marked with (S) represents a carbon atom in S configuration) and pharmaceutically acceptable salts thereof, which have a selective .beta..sub.2 -adrenergic receptor stimulating effect with relieved burdens on the heart such as tachycardia and are useful as an agent for the prevention of threatened abortion and premature labor, a bronchodilator and an agent for pain remission and stone removal in urolithiasis.
本发明涉及一种以一般式表示的3,4-二取代
苯乙醇胺四环酰胺衍
生物:##STR1##(其中A表示较低的烷基链;B表示
氨基,二(较低烷基)
氨基或3到7个成员的脂环
氨基,该脂环
氨基可以在环中含有一个氧原子;n是1或2的整数;带有*标记的碳原子表示具有R构型、S构型或两者的混合的碳原子;带有(S)标记的碳原子表示具有S构型的碳原子),以及其药学上可接受的盐。该化合物具有选择性β2-
肾上腺素能受体刺激作用,减轻心脏负担,如心动过速,并可用作预防威胁性流产和早产、支气管扩张剂以及用于疼痛缓解和尿路结石除石剂的药物。