Supplier Page from Thermo Fisher Scientific for Tetra-n-butylammonium hydroxide, 40% w/w in methanol
Ethyl (ethoxymethylene)cyanoacetate, 98% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl isonipecotate, 98+% from Thermo Fisher Scientific
Eugenol, 99% from Thermo Fisher Scientific