Supplier Page from Thermo Fisher Scientific for 3,6-Di-2-pyridyl-1,2,4,5-tetrazine, 96%
2-Ethyl-1,3-hexanediol, 99%, mixture of isomers from Thermo Fisher Scientific
3-Ethoxy-2-cyclohexen-1-one, 99% from Thermo Fisher Scientific
3-Fluorobenzaldehyde, 98+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific