Supplier Page from Thermo Fisher Scientific for 1,3,5-Trimethyl-1H-pyrazole-4-carboxaldehyde, 98%
Ethyl 4-chlorobutyrate, 97% from Thermo Fisher Scientific
Ethyl chloroacetate, 99% from Thermo Fisher Scientific
Ethyl cyanoacetate, 98+% from Thermo Fisher Scientific