Chemical Analyses of Coniferous Flavonoids in Korea - The Flavonoids of Red Pine Bark(Pinus densiflora) -

침엽수(針葉樹) 수피(樹皮)의 Flavonoid에 관한 성분분석(成分分析) (I) - 소나무 수피(樹皮)의 Flavonoids -

The flavonoids from plants is very widly used as natural dye for food and medicine etc. In this study, red pine which is widespread in Korea was studied to find new chemicals which may use as raw material for the special purpose. The fIavonoids of red pine bark were separated with Sephadex LH-20 and Toyo pearl HW-40F as packed materials and the structure of separated f1avonoids was determined by $^1H$-and $^{13}C$-NMR spectroscopy. The (+) catechin which is widespread in nature and dihydroquercetin-3'-0-${\beta}$-galactoside were found in red pine bark. The dihydroquercetin-3'-0-${\beta}$-galactoside is newly found in this species.