Novel 4-hydroxy-2-benzimidazoline-thione compound of the formula: ##STR1## wherein R is lower alkyl; R.sub.1 and R.sub.2, which can be the same or different, are hydrogen or lower straight-chained or branched alkyl or R.sub.1 and R.sub.2 together represent alkylene; and R.sub.3 is a hydrogen atom or an acyl radical; and the pharmacologically acceptable salts thereof; have marked .beta.-receptor blocking action and are outstandingly useful in the treatment or prophylaxis of cardiac and circulatory diseases.
化合物名称为
4-羟基-2-
苯并咪唑硫酮,分子式为:##STR1## 其中R为低碳基;R.sub.1和R.sub.2可以相同或不同,为氢或低直链或支链烷基,或R.sub.1和R.sub.2一起代表着烷基;R.sub.3为氢原子或酰基基团;以及其药理学上可接受的盐。该化合物具有显著的β-受体阻滞作用,非常适用于心脏和循环系统疾病的治疗或预防。