Supplier Page from Aladdin Scientific Corporation for DBCO-PEG4-Biotin
(3-Ammoniopropyl)di-tert-butylphosphonium bis(tetrafluoroborate) from Aladdin Scientific Corporation
3-Fluoro-4-nitrobenzoic Acid from Aladdin Scientific Corporation
5-Amino-2-methylbenzothiazole dihydrochloride from Aladdin Scientific Corporation
rel-(1S,2S,5R)-6-oxo-3-azabicyclo[3.2.0]heptane-2-carboxylic acid;2,2,2-trifluoroacetic acid from Aladdin Scientific Corporation