Studies on the Components of Magnolia obovata THUNB. IV. Components of Leaves. (1)

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  • ホオノキの成分研究(第4報) 葉の成分その1
  • ホオノキの成分研究-4-葉の成分-1-
  • ホオノキ ノ セイブン ケンキュウ 4 ワ ノ セイブン 1

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Description

From the leaves of Magnolia obovata, α- and β-pinene, camphene, limonene, bornyl acetate (III), caryophyllene (IV), caryophyllene epoxide (V), and chavicol (VII) were identified as components of its essential oil, and ethyl palmitate (trace), ethyl stearate (trace), and palmitic acid (VI) were also isolated and characterized. The main component of the essential oil of fresh leaves was IV, while that of dried leaves was V. The conversion of IV into V advanced with drying of the leaves and ratio of V to the total amount of IV + V reached 85% after drying for 30 days. From the observation of the conversion of IV, impregnated into filter papers under various conditions, the conversion was found to be caused by air oxidation.

Journal

  • YAKUGAKU ZASSHI

    YAKUGAKU ZASSHI 96 (2), 218-222, 1976

    The Pharmaceutical Society of Japan

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