Definition: A group of compounds that are derivatives of oxo-pyrrolidines. A member of this group is 2-oxo pyrrolidine, which is an intermediate in the manufacture of polyvinylpyrrolidone. (From Merck Index, 11th ed)
nefiracetam [ DM 9384,DM-9384,N-(2,6-dimethylphenyl)-2-(2-oxo-1-pyrrolidinyl)acetamide ] antagonizes amnestic effects of picrotoxin or bicuculline; structure given in first source