135909-56-7 2-(Glutathione-yl)-N,N,N',N'-tetramethyl-4-phenylenediamine 2-GS-Tmpd Glycine, N-(S-(2,5-bis(dimethylamino)phenyl)-N-L-gamma-glutamyl-L-cysteinyl)- N-(S-(2,5-Bis(dimethylamino)phenyl)-N-L-gamma-glutamyl-L-cysteinyl)glycine