Supplier Page from Thermo Fisher Scientific for Hydrobromic acid, pure, ca. 48 wt% solution in water
2-Ethoxybenzamide, 97% from Thermo Fisher Scientific
3-Fluorobenzoic acid, 99% from Thermo Fisher Scientific
Ethyl butyrylacetate, 98% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific