1,4-Dibromo-1,1,2,2-tetrafluorobutane18599-20-7100 % similar Dibromotetrafluoroethane124-73-240 % similar 1-Bromo-2-chloro-1,1,2,2-tetrafluoroethane354-53-031 % similar 1-Bromo-1,1,2,2-tetrafluoro-2-iodoethane421-70-531 % similar 1-Bromo-1,1,2,2,3,3,3-heptafluoropropane422-85-531 % similar