Apigenin Derivatives of Paulownia coreana Uyeki Leaves

초록

The leaves of Paulownia coreana Uyeki were extracted with acetone-H2O (7:3, v/v), concentrated under reduced pressure and fractionated successively with n-hexane, methylene chloride and ethyl acetate, leaving residual water soluble fraction. A portion of the resulting aqueous soluble powder was chromatographed on a Sephadex LH-20 column using aqueous methanol and ethanol-hexane as washing solvents. Three apigenin derivatives were isolated and identified as apigenin-7-O-β-D-glucpyranoside, apigenin-7-O-β-D-glucuronopyranoside and apigenin-7-O-[β-D-glucuronopyranosyl(1→2)-O-β-D-glucuronopyranoside] by spectroscopic methods including NMR and FAB-MS.

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