Supplier Page from Thermo Fisher Scientific for 2-(Trifluoromethyl)phenylglyoxal hydrate, 98%, dry wt. basis
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethyl propiolate, 99% from Thermo Fisher Scientific
Ethylene carbonate, 99+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific