(gamma-Glu-L-cys-gly)-nem 60189-42-6 Gcg-nem Glycine, N-(N-L-gamma-glutamyl-L-cysteinyl)-, compd. with 1-ethyl-1H-pyrrole-2,5-dione (1:1) N-Ethylmaleimide-gamma-glutamyl-cysteinyl-glycine S-(Ethylsuccinimido)-gamma-glutamyl-L-cysteinyl-glycine