Supplier Page from Thermo Fisher Scientific for Niobium foil, 0.127mm (0.005in) thick, 99.97% (metals basis excluding Ta), Ta :<0.06%
3-Fluorobenzyl bromide, 95% from Thermo Fisher Scientific
Ethyl 2-bromoisobutyrate, 98% from Thermo Fisher Scientific
Ethyl L(-)-lactate, 97% from Thermo Fisher Scientific
Ethyl pyruvate, 98% from Thermo Fisher Scientific