1 1 2 2-tetrachlor-1 2-difluorethan July 8, 2019 16 32 64 128 1 1 2 2 tetrachloro 1 2 difluoroethane 1 1-dichloro-2 2 2-trifluoroethane 1 1 2-trichloro-1 2 2-trifluoroethane
