Supplier Page from Thermo Fisher Scientific for Sodium carbonate, anhydrous, Puratronic:r, 99.997% (metals basis)
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
N-Ethylaniline, 98% from Thermo Fisher Scientific