• 제목/요약/키워드: Betula platyphylla var. latifolia

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Phenolic Compounds on the Leaves of Betula Platyphylla var. latifolia

  • Lee, Min-Won;Takashi Tanaka;Gen-Ichiro Nonaka;Hahn, Dug-Ryoung
    • Archives of Pharmacal Research
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    • 제15권3호
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    • pp.211-214
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    • 1992
  • Chemical examination of Betula platyphylla var. latifolia afforded a novel diarylheptanoid named betulateraol, together with a phenylpropanoid (3, 4'-dihydroxypropio-phenone), flavan-3-ol [(+)-catechin] and its glycosides [(+)-catechin 5-O-$\beta$-glucopyranoside, (+)-catechin 7-0-$\beta$-D-glucopyranoside] and two proanthocyanidins (procyanidins B-1 and B-3).

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Flavonoids from the Leaves of Betula platyphylla var. latifolia

  • Lee, Min-Won
    • 생약학회지
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    • 제25권3호
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    • pp.199-203
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    • 1994
  • Chemical examination of the leaves of Betula platyphylla var. latifolia has led to the isolation and characterization of five flavonoid glycosides including two C-glucosyl flavonoids. The structures of these compounds were elucidated as myricetin $3-O-{\alpha}-_L-rhamnoside$ (myricitrin), $quercetin-3-O-{\beta}-_D-glucopyranoside$ (isoquercitrin), $quercetin-3-O-{\beta}-_D-glucopyranoside$ (hyperoside), $nalingenin-6-C-{\beta}-_D-glucopyranoside$ (hemiphloin) and $aromadendrin-6-C-{\beta}-_D-glucopyranosidre(6-C-glucosyldihydrokaempferol)$ on the basis of physico-chemical and spectroscopic evidences.

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Determination of the Structure for Polysubstituted Flavonoid and 6-C-Glucosyl Flavonoids using $^{13}C-^{1}H$ Long Range Couplings

  • Lee, Min-Won
    • Archives of Pharmacal Research
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    • 제17권6호
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    • pp.487-489
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    • 1994
  • A flavone glycoside was isolated from the leaves of Betula platyphylla var. latifolia and characterized as $4, 6-Dimethoxy-5-hydroxyflavone-7-O-{\beta}-D-glucoside(pectolinarigenin-7-O-{\beta}-D-glucopy-ranoside)$ by method of chemical and NMR spectral analysis. $^13C-^1H$ long range coupling was confirmative for determination of its substituted position. In connection with this study, 6-C-Glucosylnalingenin and 6-C-Glucosylaromadendrin were confirmed its structures using this technique.

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