Supplier Page from Thermo Fisher Scientific for Niobium foil, 0.05mm (0.002in) thick, annealed, 99.8% (metals basis)
2-Fluorobenzaldehyde, 97% from Thermo Fisher Scientific
3-Fluorobenzyl bromide, 95% from Thermo Fisher Scientific
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific