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)
aniracetam [ Ro 13-5057,1-(4-methoxybenzoyl)-2-pyrrolidinone,1-anisoyl-2-pyrrolidinone,Ro-13-5057 ] mental performance enhancer; RN given refers to cpd with locant for methoxy group in position 4 & from USAN 1983