Supplier Page from Aladdin Scientific Corporation for Tetrapropylammonium hydroxide solution（TPAOH）
(5-Trimethylsilanylethynyl-pyridin-2-yl)-carbamic acid tert-butyl ester from Aladdin Scientific Corporation
3-(4-Pyridyl)-L-alanine Dihydrochloride from Aladdin Scientific Corporation
L-Asparagine Monohydrate from Aladdin Scientific Corporation
pH Buffer Standard Solution（pH=4.01） from Aladdin Scientific Corporation