Supplier Page from Thermo Fisher Scientific for Pyrazolo[1,5-a]pyridine-7-carboxaldehyde, 97%
Ethyl cyanoacetate, 98+% from Thermo Fisher Scientific
Ethyl phenylpropiolate, 98% from Thermo Fisher Scientific
Ethyl trifluoroacetate, 99% from Thermo Fisher Scientific
Ethyltriphenylphosphonium bromide, 98% from Thermo Fisher Scientific