Supplier Page from Thermo Fisher Scientific for (µ+)-Camphor, 96%
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl indole-2-carboxylate, 97% from Thermo Fisher Scientific
N-Formylpiperidine, 99% from Thermo Fisher Scientific