The molecule is an S-substituted glutathione that is glutathione in which the mercapto hydrogen has been replaced by a methyl group. It is a S-substituted glutathione and a methyl sulfide. It is a tautomer of a S-methylglutathione zwitterion.
(2S)-2-amino-5-[[(2R)-1-(carboxymethylamino)-3-methylsulfanyl-1-oxopropan-2-yl]amino]-5-oxopentanoic acid