1-Chloro-1,2,2-trifluorocyclobutane661-71-2100 % similar 1,2-Dichlorotetrafluoroethane76-14-232 % similar 1,1,2-Trichloro-2,3,3-trifluorocyclobutane697-17-631 % similar 1,2-Dichloro-1,1-difluoroethane1649-08-730 % similar