The present invention relates to a compound of the formula ##STR1## and the pharmaceutically acceptable salts thereof wherein W is a bicyclic heterocyclic ring system. The compounds are .alpha.-1 adrenergic antagonists and are useful in the treatment of BPH; also disclosed are .alpha.-1 antagonist compositions and a method for antagonizing .alpha.-1 adrenoreceptors and tr
这项发明涉及一种具有以下结构的化合物##STR1##及其药用可接受的盐,其中W是一个双环杂环环系统。这些化合物是α-1
肾上腺素受体拮抗剂,对于治疗BPH很有用;还披露了α-1拮抗剂组合物和拮抗α-1
肾上腺素受体的方法。