Supplier Page from Thermo Fisher Scientific for Triethyl 4-phosphonocrotonate, 92%, predominantly trans
2-Ethylaniline, 98% from Thermo Fisher Scientific
3-Fluorobenzyl bromide, 95% from Thermo Fisher Scientific
Ethylenediaminetetraacetic acid, 99%, pure from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific