Oxiracetam is a cyclic derivative of γ-aminobutyric acid (GABA) which has been commonly used as nootropic drug to treat cognitive impairments.
References:
[1]. Li W, et al. (S)-Oxiracetam is the Active Ingredient in Oxiracetam that Alleviates the Cognitive Impairment Induced by Chronic Cerebral Hypoperfusion in Rats. Sci Rep. 2017 Aug 30;7(1):10052.
















