Not Less Than - 95%
(S)-O-Desmethyl Naproxen; (αS)-6-Hydroxy-α-methyl-2-naphthaleneacetic Acid; (S)-2-(6-Hydroxy-2-naphthyl)propionic Acid; (S)-6-O-Desmethylnaproxen; (S)-6-Demethylnaproxen; O-Desmethylnaproxen