Supplier Page from Thermo Fisher Scientific for 3-Methyl-2-cyclopenten-1-one, 98%, stab. with 0.1% hydroquinone
3-Fluorobenzoic acid, 99% from Thermo Fisher Scientific
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethyl picolinate, 99% from Thermo Fisher Scientific
Fluorescein isothiocyanate isomer I, 90%, pure from Thermo Fisher Scientific