Supplier Page from Thermo Fisher Scientific for Zinc sulfate heptahydrate, 99.5%, for analysis
3-Fluorobenzaldehyde, 98+% from Thermo Fisher Scientific
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethyl 2-oxocyclohexanecarboxylate, 95% from Thermo Fisher Scientific
Ethyl 4-chlorobutyrate, 97% from Thermo Fisher Scientific