Flavonoids from the leaves of Ilex cornuta

To study the chemical constituents of the leaves of Ilex cornuta Lindl. ex Paxt.. METHODS: The compounds were isolated by column chromatography with silica gel and preparative HPLC. Their structures were determined on the basis of physicochemical properties and spectroscopic analysis. RESULTS: Nine flavonoids were obtained and identified as kaempferol-3-O-beta-D-glucopyranosyl-(1 -> 2)-alpha-L-arabinopyranoside (1), quercetin-3-O-beta-D-glucopyranosyl-(1 -> 2)-alpha-L-arabinopyranoside (2), isorharmetin-3-O-beta-D-glucopyranoside (3), hyperin (4), 3'-methoxydaidzin (5) isorhamnetin(6), formononetin (7), kaempferol (8), quercetin (9). CONCLUSION: Compound 1 is a new flavonoid.