CAS 126695-58-7 appears in our catalog under these names: N-Succinimidyl 4-Azido-2,3,5,6-tetrafluorobenzoate, >95% (HPLC), 4–N3Pfp–NHS ester, ATFB-NHS, N-Succinimidyl 4-Azido-2,3,5,6-tetrafluorobenzoate, >97.0%(HPLC), 4-N3Pfp-NHS ester, 97.95%. Offered by: TRC, GLPBio, Iris Biotech, TCI, MedChemExpress. Available pack sizes: 100mg, 500mg, 50mg, 1g, 200mg, 250mg, 5g, 25 mg.