Supplier Page from Thermo Fisher Scientific for 5(6)-Carboxyfluorescein, mixture of isomers, 97%
1,2-Ethanedithiol, 95% from Thermo Fisher Scientific
4'-Fluoroacetophenone, 99% from Thermo Fisher Scientific
4-Fluorobenzenesulfonyl chloride, 98% from Thermo Fisher Scientific
Ethyl trifluoroacetate, 99% from Thermo Fisher Scientific