Antioxidative Flavan-3-ol Glycosides from Stems of Rhizophora stylosa

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  • TAKARA Kensaku
    Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus
  • KUNIYOSHI Ayako
    Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus
  • WADA Koji
    Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus
  • KINJYO Kazuhiko
    Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus
  • IWASAKI Hironori
    Division of Molecular Biotechnology, Center of Molecular Bioscience, University of the Ryukyus

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  • Antioxidative Flavan-3-ol Glycosides from Stems of<i>Rhizophora stylosa</i>

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Two flavan-3-ol glycosides together with seven flavan-3-ols were isolated from stems of the mangrove plant, Rhizophora stylosa. Their structures were established as glabraoside A (7) and glabraoside B (8) by spectroscopic and chemical methods. The antioxidative activity of these isolated compounds evaluated by the diphenylpicrylhydrazyl (DPPH) radical scavenging reaction was higher than that of L-ascorbic acid.

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