Supplier Page from Thermo Fisher Scientific for Pyridine-2,3-dicarboxylic anhydride, 98%
Ethyl 2-bromoisobutyrate, 98% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl isonipecotate, 98+% from Thermo Fisher Scientific
Ethyl phenylpropiolate, 98% from Thermo Fisher Scientific