Oxiracetam Impurity N Catalogue A301714 CAS 68108-18-9 M.W 101.10 M.F C4H7NO2 Specifications FAQs Synonyms:(S)-4-Hydroxy-2-pyrrolidinone; (4S)-4-Hydroxy-2-pyrrolidinone; (S)-(-)-4-Hydroxy-2-pyrrolidinone; (S)-4-Hydroxy-2-pyrrolidinone