The molecule is a peptide anion obtained by deprotonation of the carboxy groups and protonation of the free amino group of gammaGluCys(IAN)Glu; major species at pH 7.3. It is a conjugate base of a gammaGluCys(IAN)Glu.
(2S)-2-[[(2R)-2-[[(4S)-4-azaniumyl-4-carboxylatobutanoyl]amino]-3-[cyano(1H-indol-3-yl)methyl]sulfanylpropanoyl]amino]pentanedioate