Structures of New Cyclic Diarylheptanoids and Inhibitors of Nitric Oxide Production from Japanese Folk Medicine <i>Acer </i><i>n</i><i>ikoense</i>

  • Toshio Morikawa
    Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
  • Jing Tao
    Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
  • Iwao Toguchida
    Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
  • Hisashi Matsuda
    Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
  • Masayuki Yoshikawa
    Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan

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説明

Three new cyclic diarylheptanoids, acerosides B1 and B2 and aceroketoside, were isolated together with 20 known compounds from a Japanese folk medicine, the stem bark of Acer nikoense. The absolute stereostructures of the new compounds were determined on the basis of chemical and physicochemical evidence. In addition, the principal diarylheptanoid constituents were found to exhibit inhibitory activity on nitric oxide production in lipopolysaccharide-activated macrophages.

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