The present invention relates to a phenylethanolaminotetralincarboxamide derivative 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; 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 a pharmaceutically acceptable salt 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 promoting stone removal in urolithiasis.
本发明涉及一种由通式所表示的
苯乙醇胺四环酰胺衍
生物:##STR1##(其中A代表较低的烷基链;B代表
氨基、二(较低的烷基)
氨基或3至7成员的脂环
氨基,该环中可能含有一个氧原子;标有*的碳原子代表(R)构型、(S)构型或它们的混合物中的一个碳原子;标有(S)的碳原子代表(S)构型的碳原子),以及其药学上可接受的盐,具有选择性β2
肾上腺素能受体刺激作用,并减轻对心脏的负担,如心动过速,可用作预防威胁性流产和早产、支气管扩张剂、疼痛缓解剂和促进尿路结石排出剂。