54(P17) シマシラキExcoecaria agallochaに含有されるジテルペンの構造(ポスター発表の部)

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概要

• 論文の詳細を見る

• From the latex of Excoecaria agallocha, skin irritant and tumor promoting substances, Excoecaria factors, have been obtained and characterized as daphnane-type diterpene esters. The resinous wood including latex, the so-called "Okinawa-jinko", has also been used as a substitute for the insence of agalwood (Jinko). We have investigated the constituents of wood of E. agallocha, and isolated nine new diterpenes (compounds 4-9 and 11-13) together with five known compounds (1-3, 10 and 14) from ether extract. The structures of these compounds were elucidated on the basis of their NMR spectra, NOE experiments and comparisons of references spectral data. Compounds 4-9, 11-12 and 13 were characterized as labdane, beyerane and kaurane-type diterpenes, respectively. As a screening study for anti-tumor-promoters, isolated compounds were examined for their inhibitory effects on the Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA) in Raji cells. Of these compounds, 14 exhibited significant inhibitory effects on EBV-EA activation.

• 天然有機化合物討論会の論文
• 1996-09-02

著者

• 藤原 靖弘

  京都薬大

• 藤原 靖弘

  Kyoto Pharmaceutical Univesity

• 小西 天二

  京都薬科大学

• 木島 孝夫

  京都薬大

• 小西 天二

  京都薬大

• 清澤 脩

  京都薬大

• 清澤 脩

  京都薬科大学

• 清沢 修

  Kyoto Pharmaceutical University

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