Lignans from the Bark of Magnolia kobus |
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| Authors: | Hak‐Ju Lee Seon‐Mi Seo Oh‐Kyu Lee Hyun‐Jin Jo Ha‐Young Kang Don‐Ha Choi Ki‐Hyon Paik Merajuddin Khan |
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| Institution: | 1. Division of Wood Chemistry and Microbiology, Korea Forest Research Institute, Seoul 130‐712, Korea, (phone: +82‐2‐961‐2747;2. fax: +82‐2‐961‐2747);3. Department of Forest Resources and Environmental Science, Korea University, Seoul 136‐701, Korea |
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| Abstract: | The Et2O‐soluble fraction from the bark of Magnolia kobus led to the isolation of two new lignans, (+)‐(7α,7′α,8α,8′α)‐3′,4,4′,5,5′‐pentamethoxy‐7,9′: 7′,9‐diepoxylignan‐3‐ol ( 1 ) and (+)‐(7α,7′α,8α,8′α)‐4,5‐dimethoxy‐3′,4′‐(methylenedioxy)‐7,9′: 7′,9‐diepoxylignan‐3‐ol ( 2 ), along with five known lignans 3 – 7 . Their structures were established on the basis of various spectroscopic analyses including 1D‐ (1H, 13C, and DEPT) and 2D‐NMR (COSY, NOESY, HMQC, and HMBC) and by comparison of their spectral data with those of related compounds. |
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| Keywords: | Magnolia kobus Lignans |
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