Studies on Chemical Constituents of Jingtiao Propolis
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    Abstract:

    This paper was carried out to investigate the chemical compositions and their quantitive analytical methods of Jingtiao propolis collected from Liaoning province for the first time. Propolis sample is extracted with 65% ethanol at 80℃,the extract is subjected to concentration under reduced pressure,solvent partition,silica gel column chromatography,recrystallization and high preparative performance liquid chromatography. Thirty one compounds are obtained and their structures are elucidated on the basis of the data of IR,UV,MS,1H-NMR,13C-NMR and physical properties. Fourteen of which are flavanoids,seven are caffeic acid analogues,six are caffeic esters,and four are other categories.

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History
  • Received:December 06,2011
  • Revised:December 06,2011
  • Adopted:December 13,2011
  • Online: January 09,2012
  • Published:
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