Supplier Page from Thermo Fisher Scientific for Diethylzinc, nominally 15% w/w in hexane, packaged under Nitrogen in resealable AcroSeal[t bottles
4-Bromobutyric acid, 98% from Thermo Fisher Scientific
8-Hydroxyquinoline, ACS reagent from Thermo Fisher Scientific
DL-Menthol, 99% from Thermo Fisher Scientific
Fumaric acid, 99+% from Thermo Fisher Scientific