Supplier Page from Aladdin Scientific Corporation for Methotrexate hydrate
1-[2-(Trimethylsilyl)ethoxycarbonyloxy]pyrrolidin-2,5-dione from Aladdin Scientific Corporation
Bromo-PEG4-azide from Aladdin Scientific Corporation
Iron(III) chloride hexahydrate from Aladdin Scientific Corporation
Potassium carbonate from Aladdin Scientific Corporation