The compounds of formula I, ##STR1## where the substituents have various significances, and physiologically acceptable hydrolyzable derivatives thereof having the hydroxy group in the 2 position of the 3-aminopropoxy side chain in esterifield form, are useful as cardioselective .beta.-adrenoceptor blocking agents.
式I的化合物,其中取代基具有各种意义,以及其生理可接受的可
水解衍
生物,其3-
氨丙氧基侧链中的羟基位于酯化形式中的2位置,可用作心脏选择性β-
肾上腺素能受体阻滞剂。