2 3 5 6-tetrafluoro-7 7 8 8-tetracyanoquinodimethane July 8, 2019 16 32 64 128 2 3 5 6-tetrafluoroterephthalic acid 2 3 5 6-tetrafluorobenzoic acid 2 2 3 3-tetrafluoropropyl ether 2 2 2-trifluoroethyl trifluoromethanesulfonate
