Supplier Page from Thermo Fisher Scientific for Gadolinium(III) nitrate hydrate, REacton:r, 99.99% (REO)
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyl N-piperazinecarboxylate, 99% from Thermo Fisher Scientific
Ethyl oxalyl chloride, 98% from Thermo Fisher Scientific
Flavone, 99+% from Thermo Fisher Scientific