1,4-Benzenedicarbonitrile, 2,3,5,6-tetrafluoro- 1835-49-0 2,3,5,6-Tetrafluoro-1,4-benzenedicarbonitrile 2,3,5,6-Tetrafluoroterephthalonitrile Diamond 2031 NSC97007 Terephthalonitrile, tetrafluoro- Tetrafluoroterephthalonitrile WLN: NCR BF CF EF FF DCN