This family gather phenylpropanoid reference materials not listed in the flavonoidanthocyanin  and coumarin families. Namely : chalcone, stilbene, aurone, lignan and other hydroxylated cinnamic acid derivatives. All these class of phytochemical substances are issued from the same biosynthetic pathway starting from phenyl-alanine to chalcone or coumarin through coumaric acid. Among this large familly of  phenylpropanoid standards, we offer a unique library of chalcones.