Supplier Page from Thermo Fisher Scientific for (Carbethoxyethylidene)triphenylphosphorane, ca. 94%, balance TPPO
Dulcitol, 99+% from Thermo Fisher Scientific
Ethyl cyanoformate, 99% from Thermo Fisher Scientific
Ethyl oxamate, 99% from Thermo Fisher Scientific
Ethyl phenylcyanoacetate, 97% from Thermo Fisher Scientific