The molecule is a peptide anion obtained by deprotonation of both carboxy groups and protonation of the glutamyl amino group of S-(1,4-dihydroxy-3-methylnaphthalen-2-yl)glutathione; major species at pH 7.3. It is a conjugate base of a S-(1,4-dihydroxy-3-methylnaphthalen-2-yl)glutathione.
(2S)-2-azaniumyl-5-[[(2R)-1-(carboxylatomethylamino)-3-(1,4-dihydroxy-3-methylnaphthalen-2-yl)sulfanyl-1-oxopropan-2-yl]amino]-5-oxopentanoate