The molecule is a peptide anion obtained by deprotonation of the carboxy groups and protonation of the free amino group of gammaGluCys(IAN)Glu. It is a conjugate base of a gammaGluCys(IAN)Gly.
(2S)-2-azaniumyl-5-[[(2R)-1-(carboxylatomethylamino)-3-[cyano(1H-indol-3-yl)methyl]sulfanyl-1-oxopropan-2-yl]amino]-5-oxopentanoate