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Stilbenoids of Korean Pine (Pinus koraiensis) Inner Bark  

Kwon, Dong-Joo (Dept. of Wood Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University)
Bae, Young-Soo (Dept. of Wood Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.37, no.5, 2009 , pp. 474-479 More about this Journal
Abstract
Pinus koraiensis inner bark was collected and extracted with 95% ethanol. The extracts were concentrated and then sequentially fractionated using n-hexane, $CH_2Cl_2$, EtOAc, and $H_2O$ to be freeze dried. A portion of EtOAc fraction (6.6 g) was chromatographed on a Sephadex LH-20 column using aqueous methanol to isolate (+)-catechin (1), (-)-epicatechin (2), and trans-pinostilbenoside (3). Resveratrol (4) and trans-pinostilbene (5) were isolated by column chromatography using EtOH-hexane mixture after purification with aqueous methanol. The structures of these stilbenosides and flavans were characterized by spectroscopic tools using NMR and MS.
Keywords
Pinus koraiensis; inner bark; column chromatography; stilbene derivatives;
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Times Cited By KSCI : 2  (Citation Analysis)
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