Herein is disclosed compounds of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each is hydrogen or lower alkyl, therapeutically acceptable acid addition salts thereof, processes for their preparation, methods of using the compounds and pharmaceutical compositions. The compounds exhibit dopamine-receptor stimulating activity in a mammal and are useful for treating hyperprolactinemia, galactorrhea, amenorrhea, impotence, Parkinsonism, diabetes, acromegaly, hypertension and other central nervous system disorders.
本文披露的是公式##STR1##的化合物,其中R.sup.1、R.sup.2、R.sup.3、R.sup.4和R.sup.5各自为氢或低烷基,其治疗上可接受的酸盐加成物,其制备方法,使用这些化合物的方法以及制药组合物。这些化合物在哺乳动物中表现出
多巴胺受体刺激活性,并用于治疗高
催乳素血症、泌乳、闭经、阳痿、帕
金森症、糖尿病、肢端肥大症、高血压和其他中枢神经系统疾病。