Supplier Page from Aladdin Scientific Corporation for (+)-Sparteine (sulfate pentahydrate)
2-oxa-5,8-diazaspiro[3.5]nonane dihydrochloride from Aladdin Scientific Corporation
DMT-functionalized silica gel from Aladdin Scientific Corporation
Potassium chromate from Aladdin Scientific Corporation
Sodium benzene-1,3-disulfonate from Aladdin Scientific Corporation