Ellagitannins from Bark of Juglans mandshurica

  • 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)
  • Received : 2009.07.24
  • Accepted : 2009.09.01
  • Published : 2009.09.25


Juglans mandshurica bark was collected and extracted with 70% aqueous acetone. 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 $H_2O$ fraction was chromatographed on a Sephadex LH-20 column using aqueous methanol to isolate (S)-2,3-HHDP-D-glucopyranoside (1). Some of EtOAc fraction was also treated on a Sephadex LH-20 column using aqueous methanol and EtOH-hexane mixture to purify pedunculagin (2). The structures of these two epimeric ellagitannins were elucidated by spectroscopic tools, NMR and MS.



Supported by : Korea Forest Service


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