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 4 5 7-tetraiodofluorescein 2 2 3 3-tetrafluoro-1 4-butanediol
