Compounds of formula I ##STR1## and their salts in which R.sub.1 is optionally substituted phenyl, R.sub.2 is alkyl, cycloalkyl or optionally substituted amino, or R.sub.2 and R.sub.3 together with the nitrogen and carbon atoms to which they are attached form an optionally substituted heterocyclic ring or R.sub.3 and R.sub.4 together with the nitrogen atom to which they are attached form an optionally substituted heterocyclic ring and R.sub.5 is H, halo, alkyl, alkoxy, trifluoromethyl or a group of formula S(O).sub.m R.sub.8 in which m is 0, 1 or 2 and R.sub.8 is alkyl have utility in the treatment of diabetes particularly in the treatment of hyperglycaemia.
化合物的
化学式I ##
STR1## 及其盐,其中R.sub.1 可选择地是取代
苯基,R.sub.2 是烷基、
环烷基或可选择地取代的
氨基,或者R.sub.2 和R.sub.3 与它们连接的
氮和
碳原子一起形成可选择地取代的杂环环或者R.sub.3 和R.sub.4 与它们连接的
氮原子一起形成可选择地取代的杂环环,R.sub.5 是H、卤素、烷基、烷
氧基、三
氟甲基或者
化学式S(O).sub.m R.sub.8 的基团,其中m 为0、1 或2,R.sub.8 是烷基,在糖尿病治疗中特别在高血糖治疗中具有用途。