Definition: 3-Phenylchromones. Isomeric form of FLAVONOIDS in which the benzene group is attached to the 3 position of the benzopyran ring instead of the 2 position.
formononetin [ formononetin, 4-(14)C-labeled ] intermediate to formation of ROTENONE; has a deleterious effect on sheep grazing in "estrogenic clover" pastures; RN given refers to unlabeled cpd