A new flavonol, brevicornin, with a 3''-methoxy-isopentyl group, was i
solated from the aerial parts of Epimedium brevicornum. Its structure
was determined to be 5,7-trihydroxy-4'-methoxy-8-(3''-methoxyisopentyl
) flavone. Four known flavonoids epimedin B, epimedin C, beta-anhydroi
caritin and tricin were also isolated from the same plant.