2,2-bis(sulfomethyl)propane-1,3-disulfonic acid

1,2,4,5-tetrafluoro-3-nitro-6-(2,3,5,6-tetrafluoro-4-nitrophenyl)sulfonylbenzene

1,2,4,5-tetrafluoro-3-[2,3,5,6-tetrafluoro-4-(trifluoromethyl)phenyl]sulfonyl-6-(trifluoromethyl)benzene

4-(4-cyano-2,3,5,6-tetrafluorophenyl)sulfonyl-2,3,5,6-tetrafluorobenzonitrile

2,3,5,6-tetrafluoro-4-(2,3,5,6-tetrafluoro-4-hydroxyphenyl)sulfonylphenol