Oxiracetam is substituted with an extra hydroxy group at R4, and that is a chiral center to the molecule. Oxiracetam is presumably made like a racemate of its enantiomers. Oxiracetam is structurally analogous to piracetam, which lacks the R4 hydroxy substitution of oxiracetam.This drug is really a CNS stimulant generally prescribed for ADHD, narcol