111574-85-7 CCRIS 3854 Glycine, N-(N-L-gamma-glutamyl-S-(trichloroethenyl)-L-cysteinyl)- N-(N-L-gamma-Glutamyl-S-(trichloroethenyl)-L-cysteinyl)glycine S-(1,2,2-Trichlorovinyl)glutathione TCVG