The molecule is an S-substituted glutathione(1-) obtained by deprotonation of the the two carboxy groups and protonation of the glutamyl amino group of (E)-1-(glutathion-S-yl)-2-(indol-3-yl)acetohydroximate. Major microspecies at pH 7.3. It is a conjugate base of an (E)-1-(glutathion-S-yl)-2-(indol-3-yl)acetohydroximate.
(2S)-2-azaniumyl-5-[[(2R)-1-(carboxylatomethylamino)-3-[(E)-N-hydroxy-C-(1H-indol-3-ylmethyl)carbonimidoyl]sulfanyl-1-oxopropan-2-yl]amino]-5-oxopentanoate