112028-42-9 Egs-hed3A Ethyleneglycol bis(succinimidyl succinate)hydroxyethylethylenediamine triacetic acid Glycine, N-(2-(bis(carboxymethyl)amino)-3-(4-((((4-(2-(4-(2,5-dihydro-2,5-dioxy-1H-pyrrol-1-yl)-1,4-dioxobutoxy)ethoxy)-1,4-dioxobutyl)amino)acetyl)amino)phenyl)propyl)-N-(2-hydroxyethyl)-, (S)-