Supplier Page from Thermo Fisher Scientific for 2-(Ethoxycarbonyl)furan-5-boronic acid pinacol ester, 96%
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl butyrylacetate, 98% from Thermo Fisher Scientific
Ethyl oxamate, 99% from Thermo Fisher Scientific