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 receptors and treating BPH.
本发明涉及公式##STR1##的化合物及其药学上可接受的盐,其中W是一个双环杂环环系。这些化合物是α-1
肾上腺素受体拮抗剂,可用于治疗BPH;还公开了α-1拮抗剂组成物和拮抗α-1受体和治疗BPH的方法。