Compounds of Formula I: ##STR1## where R.sup.5 is a group selected from Formulae (a), (b), (c) and (d): ##STR2## and the pharmaceutically acceptable salts and N-oxides thereof, are .alpha..sub.1 -adrenergic receptor antagonists useful for the treatment of diseases involving directly or indirectly an obstruction of the lower urinary tract, such as benign prostatic hyperplasia.
化合物的
化学式I:##STR1##其中R.sup.5是从式(a)、(b)、(c)和(d)中选择的基团:##STR2##以及其药用可接受的盐和N-氧化物,是用于治疗涉及直接或间接阻塞下尿道的疾病,如良性前列腺增生的α1-
肾上腺素受体拮抗剂。