57 The invention relates to the 3-mercapto-2-oxo-1-pyrrolidinyl acetic acid and its derivatives, endowed with mucolithic, expectorant, anti-cough activities; to a process for their preparation by treatment of the related 3-bromoderivatives with the corresponding thiol and to the pharmaceutical preparations containing these compounds as active principle.
57 本发明涉及具有粘液、祛痰和止咳活性的 3-巯基-2-氧代-1-
吡咯烷基
乙酸及其衍
生物;通过用相应的
硫醇处理相关的 3-
溴代衍
生物来制备它们的工艺,以及含有这些化合物作为活性成分的药物制剂。