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KMID : 0903520090520050560
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2009 Volume.52 No. 5 p.560 ~ p.563
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Two Lignans from the Stem Bark of Styrax japonica
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Hung Tran-Manh
Lee Mi-Kyoung
Min Byung-Sun
Kim Jin-Cheol
Choi Jae-Sue
Lee Hyeong-Kyu
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Abstract
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Two lignans, 1R,2R,5S,6R-2-(4’-hydroxy-3’-methoxyphenyl)-6-(3’’,4’’-dimethoxyphenyl)-3,7-dioxabicyclo[3.3.0]octane 4’-O-β-D-glucopyranoside (1) and styraxlignolides F (2), were isolated from the EtOAc-soluble fraction of the stem bark of Styrax japonica (Styracaceae). The structures of lignans (1-2) were determined by spectroscopic means. The absolute configuration for styraxlignolides F (2), (2S,3S)-2-(3’’,4’’-dimethoxybenzyl)-3-(4’-hydroxy-3’-methoxybenzyl)-γ-butyrolactone 4’-O-(β-D-glucopyranoside), was unambiguously confirmed by X-ray diffraction analysis.
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KEYWORD
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antioxidant, styraxlignolide G, lignan, Styracaceae, Styrax japonica
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