Supplier Page from Thermo Fisher Scientific for 2,3-Dimethoxycinnamic acid, predominantly trans, 98+%
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl isonipecotate, 98+% from Thermo Fisher Scientific
Ethyl phenylcyanoacetate, 97% from Thermo Fisher Scientific