1,1,2,2-Tetrafluoro-2-(1,1,2,2-tetrafluoro-2-iodoethoxy)ethanesulfonyl fluoride66137-74-4100 % similar 2-[1-[Difluoro[(1,2,2-trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2-tetrafluoroethanesulfonyl fluoride16090-14-544 % similar Perfluorobutanesulfonyl fluoride375-72-438 % similar Perfluoro(2-ethoxyethane)sulfonic acid113507-82-738 % similar Perfluorooctanesulfonyl fluoride307-35-737 % similar 1,1,2,2,3,3,4,4,5,5,6,6,6-Tridecafluoro-1-hexanesulfonyl fluoride423-50-737 % similar Trifluoromethanesulfonyl fluoride335-05-733 % similar 2-Hydroxytetrafluoroethanesulfonic acid β-sultone697-18-733 % similar