Compounds of general formula (I): ##STR1## in which: R.sub.1 represents a hydrogen atom or a lower alkyl group, and R.sub.2 represents a substituted or unsubstituted alkyl, a phenyl or a substituted or unsubstituted heteroaryl, their enantiomers, diastereoisomers and epimers and their addition salts with a pharmaceutically acceptable base when R.sub.1 represents a hydrogen atom or when R.sub.2 comprises a carboxylic acid group. Medicinal products.
通式(I)的化合物:##
STR1## 其中:R.sub.1代表
氢原子或较低的烷基基团,R.sub.2代表取代或未取代的烷基、
苯基或取代或未取代的杂环基,它们的对映异构体、顺反异构体和外消旋体以及它们与药用可接受碱的加合物,当R.sub.1代表
氢原子或R.sub.2包括
羧酸基团时。药物产品。