Supplier Page from Thermo Fisher Scientific for 15-Crown-5, 98%
Ethyl bromopyruvate, 80-85% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
Ethylenediaminetetraacetic acid, tetrasodium salt hydrate, 98%, pure from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific