142628-08-8 CCRIS 6660 L-Cysteine, S-(2-bromo-2-chloro-1,1-difluoroethyl)- S-(2-Bromo-2-chloro-1,1-difluoroethyl)-L-cysteine S-(2-Bromo-2-chloro-1,1-difluoroethyl)cysteine