Supplier Page from Thermo Fisher Scientific for 4-(2'-Pyridylazo)resorcinol, 97+%, ACS reagent
1-Ethylpiperidine, 99% from Thermo Fisher Scientific
2-Fluorobenzoic acid, 99% from Thermo Fisher Scientific
Ethyl 3-pyridylacetate, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific