Not less than 95.0%
(5RS)-5-Ethenylpyrrolidin-2-one; 5-Ethenyl-2-pyrrolidinone; 5-Vinyl-2-pyrrolidinone; (±)-5-Vinylpyrrolidin-2-one; 5-Vinyl-2-pyrrolidinone; 5-Vinylpyrrolidin-2-one; Vigabatrin Related Compound A