3,4-Disubstituted phenylethanolaminotetralincarboxamide derivatives represented by general formula (1) and their pharmacologically acceptable salts having a selective β2-adrenergic receptor stimulating effect with a relieved burden on the heart such as a frequent pulse. In said formula, A represents lower alkylene; B represents amino, di(lower alkyl)amino or 3- to 7-membered alicyclic amino optionally containing oxygen in the ring; n is an integer of 1 or 2; the carbon atom marked with "*" means a carbon atom or the R- or S- configuration or a mixture thereof; and the carbon atom marked with "(S)" means a carbon atom of the S-configuration. These compounds are useful as a preventive for threatened abortion/premature birth, a bronchodilator and a pain-relieving and lithagogue agent in ureterolithiasis.
由通式(1)代表的3,4-二取代
苯乙醇胺四氢甲酰胺衍
生物及其药理上可接受的盐,具有选择性β2-
肾上腺素能受体刺激作用,可减轻心脏负担,如频繁脉搏。在所述式中,A 代表低级亚烷基;B 代表
氨基、二(低级烷基)
氨基或环中任选含氧的 3 至 7 元脂环
氨基;n 是 1 或 2 的整数;标有 "*"的碳原子指碳原子或 R 或 S 构型或其混合物;标有"(S) "的碳原子指 S 构型的碳原子。这些化合物可用于预防妊娠流产/早产、支气管扩张剂以及输尿管结石病的止痛和碎石剂。