1,2,3,4-C6F4H2, benzene,1,2,3,4-tetrafluoro, 1,2,3,4-Tetrafluorobenzyl, 4-flurobenzoyl chloride, 1,2,3,4-Tetrafluorbenzol, 1,2,3,4,-tetrafluorobenzene, 1,2,3,4-Tetrafluorob, o-Tetrafluorobenzene, 2,3,4,5-Tetrafluorobenzene, 1,2,3,6-Tetrafluorobenzene, Benzene, 1,2,3,4-tetrafluoro-