Supplier Page from Thermo Fisher Scientific for Yttrium(III) nitrate hydrate, REacton:r, 99.99% (REO)
Estrone, 99+% from Thermo Fisher Scientific
Ethyl 4,4,4-trifluoroacetoacetate, 97% from Thermo Fisher Scientific
Ethyl chloroformate, 99% from Thermo Fisher Scientific
meso-Erythritol, 99% from Thermo Fisher Scientific