Supplier Page from Thermo Fisher Scientific for Potassium bromide, 99.999%, (trace metal basis)
3-Fluorobenzoic acid, 99% from Thermo Fisher Scientific
Ethyl 3-aminocrotonate, 98.5% from Thermo Fisher Scientific
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl indole-2-carboxylate, 97% from Thermo Fisher Scientific