Supplier Page from Thermo Fisher Scientific for Quinine, anhydrous, 99% (total base), may cont. up to 5% dihydroquinine
4-Ethylaniline, 99+% from Thermo Fisher Scientific
4-Ethylphenol, 97% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyltriphenylphosphonium bromide, 98% from Thermo Fisher Scientific