2-(2-Oxo-1-pyrrolidinyl)acetic acids of the formula ##STR1## wherein R.sup.2 is hydrogen or lower alkyl and R.sup.11 is hydrogen, lower alkanoyl or another group readily cleavable by means of ammonia, are described. The compounds of formula III of the invention are useful to prepare the compound of formula I of the invention which are useful as medicaments, for example, in the form of pharmaceutical preparations.
本发明提供了式子##STR1##中R.sup.2为氢或低碳基,R.sup.11为氢,低烷酰基或其他通过
氨基容易断裂的基团的2-(2-氧代-1-
吡咯烷基)
乙酸。本发明的III式化合物可用于制备本发明的I式化合物,其可作为药物,例如以制药制剂的形式使用。