Supplier Page from Thermo Fisher Scientific for µb-Propiolactone, 97%
2(2-Ethoxyethoxy)ethanol, 98+% from Thermo Fisher Scientific
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl propiolate, 99% from Thermo Fisher Scientific