69306-79-2 Glycine, N,N'-((7-amino-6,10-dioxo-1,2-dithia-5,11-diazacyclotridecane-4,12-diyl)dicarbonyl)bis-, (4R-(4R*,7S*,12R*))- alpha,gamma-Glu-cystinyl-bis(gly) alpha,gamma-Glutamyl-cystinyl-bis(glycine) alpha,gamma-Glutamylcystinylbis(glycine)