Supplier Page from Thermo Fisher Scientific for Tetrahydrofuran, anhydrous, 99.8+%, stab. with 0.025% BHT, packaged under Argon in resealable ChemSealµt bottles
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
Ethyl phenylcyanoacetate, 97% from Thermo Fisher Scientific
Ethyl propiolate, 99% from Thermo Fisher Scientific