Supplier Page from Thermo Fisher Scientific for Copper, 99%, powder, max. 106 µm (-140 mesh)
3-Fluorobenzoic acid, 99% from Thermo Fisher Scientific
Ethyl (ethoxymethylene)cyanoacetate, 98% from Thermo Fisher Scientific
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl phenylpropiolate, 98% from Thermo Fisher Scientific