The molecule is dication of glutathionylspermidine arising from deprotonation of the terminal carboxy group and protonation of the primary and secondary amino groups; major species at pH 7.3. It is a peptide cation and an ammonium ion derivative. It is a conjugate acid of a glutathionylspermidine.
(2S)-2-azaniumyl-5-[[(2R)-1-[[2-[3-(4-azaniumylbutylazaniumyl)propylamino]-2-oxoethyl]amino]-1-oxo-3-sulfanylpropan-2-yl]amino]-5-oxopentanoate