Supplier Page from Thermo Fisher Scientific for Hydrazine hydrate, 55% (Hydrazine, 35%)
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
DL-Ethyl 2-bromopropionate, 99% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl oxamate, 99% from Thermo Fisher Scientific