• Journal of the Korean Wood Science and Technology
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• v.13 no.4
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• pp.58-66
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• 1985

In order to elucidate chemical structure of the wood extractives, softwood (Pinus koraiensis Sieb. et Zucc.) meal was extracted with 95% ethanol at room temperature for 72 hours. The extract was fractionated with organic solvents such as n-hexane, ether, ethylacetate, and acetone. From the n-hexane and ether soluble fraction of the wood extractives, four flavonoid compounds were isolated and identified as 5-hydroxy-7-methoxyflavone (I), 5-methoxy-7-hydroxyflavone (II), 5-hydroxy-7-methoxyflavanone (III), and 5-methoxy-7-hydroxyflavanone (IV) by UV, IR, $^1$H-NMR spectroscopy and MS spectrometry.