Supplier Page from Thermo Fisher Scientific for 12-Crown-4, 98%
4-Ethylphenol, 97% from Thermo Fisher Scientific
Ethyl 2-oxocyclohexanecarboxylate, 95% from Thermo Fisher Scientific
Ethyl 3-hydroxybutyrate, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific