The invention provides compounds of the general formula (I) ##STR1## wherein the substituents are defined in the specification, and physiologically acceptable salts and solvates thereof. The compounds of formula (I) have a selective stimulant action at .beta..sub.2 -adrenoreceptors and are useful, in particular in the treatment of diseases associated with reversible airways obstruction such as asthma and chronic bronchitis.
该发明提供了一般式(I)的化合物 ##STR1## 其中取代基在说明书中定义,并且其生理上可接受的盐和溶剂化合物。式(I)的化合物在β2-
肾上腺素受体上具有选择性的兴奋作用,并且特别适用于治疗与可逆性气道阻塞相关的疾病,如哮喘和慢性支气管炎。