Supplier Page from Thermo Fisher Scientific for Hydrogen bromide, pure, 33 wt% solution in glacial acetic acid
4-Fluoroaniline, 98% from Thermo Fisher Scientific
Ethyl 2-oxocyclohexanecarboxylate, 95% from Thermo Fisher Scientific
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl 4-dimethylaminobenzoate, 99+% from Thermo Fisher Scientific