Supplier Page from Thermo Fisher Scientific for Methyl 4-cyano-5-(methylthio)thiophene-2-carboxylate, 97%
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl phenylcyanoacetate, 97% from Thermo Fisher Scientific
Fluorescein isothiocyanate isomer I, 90%, pure from Thermo Fisher Scientific