The present invention relates to a compound of the formula ##STR1## and the pharmaceutically acceptable salts thereof wherein W is a tricyclic heterocyclic ring system; which is an .alpha.-1 adrenergic antagonist and is useful in the treatment of BPH; also disclosed are .alpha.-1 antagonist compositions and a method for antagonizing .alpha.-1 receptors and treating BPH.
本发明涉及一种化合物,其
化学式为##STR1##及其药学上可接受的盐,其中W为
三环杂环环系;该化合物是α-1
肾上腺素受体拮抗剂,可用于治疗前列腺增生症;本发明还公开了α-1拮抗剂组合物和拮抗α-1受体和治疗前列腺增生症的方法。