Supplier Page from Thermo Fisher Scientific for tert-Butyl (S)-5-oxopyrrolidine-2-carboxylate, 95%
4-Ethylphenol, 97% from Thermo Fisher Scientific
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl cyanoformate, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific