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KMID : 0903520070500040348
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2007 Volume.50 No. 4 p.348 ~ p.351
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The Chemical Constituents of the Stem Barks of Fraxinus rhynchophylla
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Yang Eun-Ju
Lee Dong-Geun
Lee Jong-Won
Kim Yae-Sil
Lim Sun-Ha
Song Kyung-Sik
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Abstract
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The stem barks of Fraxinus rhynchophylla was extracted with 95% EtOH, and the concentrated extract was successively partitioned with CH Cl , n-BuOH, and H O in order to investigate the major phytochemicals. From the CH Cl soluble fraction, a sterol (1) was isolated through the repeated silica gel column chromatographies. Three additional compounds (2-4) were isolated from the n-BuOH soluble fraction through silica gel, RP-18, and Sephadex LH-20 column chromatogra- phies. Their chemical structures were elucidated as daucosterol (1; β-sitosterol-3-O-β-D-glucopyra- noside), caffeic acid (2), 6,8-dihydroxy-7-methoxycoumarin (3), and coniferaldehyde glucoside (4) by comparing their spectral data with those in the literatures. All isolates (1-4) were the first to be iso- lated from F. rhynchophylla.
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KEYWORD
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Fraxinus rhynchophylla, daucosterol, caffeic acid, 6, 8-dihydroxy-7-methoxycoumarin, coniferaldehyde
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