Supplier Page from Aladdin Scientific Corporation for β-Carotene
2-(Benzofuran-3-yl)acetic acid from Aladdin Scientific Corporation
4-Ethyl-1,3-dimethyl-1H-pyrazol-5-amine sesquihydrate from Aladdin Scientific Corporation
Nα-(tert-Butoxycarbonyl)-L-tryptophan N-Succinimidyl Ester from Aladdin Scientific Corporation
Sodium benzene-1,3-disulfonate from Aladdin Scientific Corporation