• Title/Summary/Keyword: kaempferol 7-O-methylether

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Flavonoids and Aromatic Compounds from the Rhizomes of Zingiber zerumbet

  • Jang Dae Sik;Han Ah-Reum;Park Gowooni;Jhon Gil-Ja;Seon Eun-Kyoung
    • Archives of Pharmacal Research
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    • v.27 no.4
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    • pp.386-389
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    • 2004
  • Repeated column chromatography of the CHCI_3-soluble fraction of Zingiber zerumbet led to the isolation and identification of two aromatic compounds, p-hydroxybenzaldehyde (1) and vanillin (2), and six kaempferol derivatives, kaempferol-3,4',7-O-trimethylether (3), kaempferol-3-O-methylether (4), kaempferol-3,4'-O-dimethylether (5), 4'-O-acetylafzel in (6), kaempferol-3-O-(4-O-acetyl-$\alpha$-L-rhamnopyranoside)], 2',4'-O-diacetylafzelin (7), kaempferol-3-O-(2,4-O-diacetyl-$\alpha$-L-rhamnopyranoside)], and 3',4'-O-diacetylafzelin (8), kaempferol-3-O-(3,4-O-diacetyl-$\alpha$-L-rhamnopyranoside)]. The structures of 1-8 were identifed by analysis of spectroscopic data as well as by comparison with published values. This is the first report on the isolation of compounds 1-3 from this plant.

Constituents from Syzygium aromaticum Merr. et Perry

  • Son, Kun-Ho;Kwon, Soon-Youl;Kim, Hyun-Pyo;Chang, Hyeun-Wook;Kang, Sam-Sik
    • Natural Product Sciences
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    • v.4 no.4
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    • pp.263-267
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    • 1998
  • From the dried flower-buds of Syzygium aromaticum Merr. et Perry (Myrtaceae), seven compounds, i.e., eugenol (1), oleanolic acid (2), kaempferol 7-O-metylether (3), 3,3',4-tri-O-methylellagic acid (4), maslinic acid (5), ${\beta}-sitosterol-3-O-glucoside$ (6), and isorhamnetin 3-O-glucoside (7) were isolated. Compound 1 showed cyclooxygenase-2 (COX-2) inhibitory activity.

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Flavonoids from two Cupressaceae Plants

  • Maatooq, Galal T.;El-Sharkawy, Saleh H.;Afifi, Mohamed S.;Rosazza, Jack P. N.
    • Natural Product Sciences
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    • v.4 no.1
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    • pp.9-14
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    • 1998
  • Jaceidin, Jaceidin-7-O-methylether and quercetin were isolated from-Juniperus phoenicea L. alcoholic extract, however, Sequoiaflavone was isolated from Cupressus semperiverns L. In addition, the alcoholic extracts of both plants were found to contain also kaempferol-3-O-rhamnoside, quercetrin, myricitrin, cupressuflavone. The chemical identities of the isolated compounds were established using UV, IR, $^1H-and\;^{13}C-NMR$ spectroscopy.

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