Supplier Page from Thermo Fisher Scientific for 2-Cyclopentene-1-acetic acid, tech. 90%, remainder mainly 3-cyclopentene-1-acetic acid
4-Ethylphenol, 97% from Thermo Fisher Scientific
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Ethyl cyanoacetate, 98+% from Thermo Fisher Scientific
Eugenol, 99% from Thermo Fisher Scientific