Supplier Page from Thermo Fisher Scientific for Diphenylamine-4-sulfonic acid, sodium salt, ACS reagent
4'-Fluoroacetophenone, 99% from Thermo Fisher Scientific
Ergosterol, 98% from Thermo Fisher Scientific
Esculin hydrate, 97% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific