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Journal of Natural Medicines

, Volume 65, Issue 1, pp 217–223 | Cite as

Seven new dammarane triterpenes from the floral spikes of Betula platyphylla var. japonica

  • Juan Xiong
  • Masatoshi Taniguchi
  • Yoshiki Kashiwada
  • Takashi Yamagishi
  • Yoshihisa Takaishi
Note

Abstract

Seven new dammarane-type triterpenoids, including two 20(S)-hydroxy-25-methoxy-dammar-23-enes (1 and 2), two 20(S),24(R)-epoxydammaranes (3 and 4), a cabralealactone (5), and two 20(S),25-epoxydammaranes (6 and 7), together with seven known triterpenes (814), were isolated from the floral spikes of Betula platyphylla var. japonica. The structures for all compounds were elucidated by the analyses of extensive spectroscopic data, as well as chemical examinations.

Keywords

Betula platyphylla var. japonica Floral spikes Dammarane triterpene 20,25-Epoxydammarane Betulaceae 

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Copyright information

© The Japanese Society of Pharmacognosy and Springer 2010

Authors and Affiliations

  • Juan Xiong
    • 1
  • Masatoshi Taniguchi
    • 1
  • Yoshiki Kashiwada
    • 1
  • Takashi Yamagishi
    • 2
  • Yoshihisa Takaishi
    • 1
  1. 1.Graduate School of Pharmaceutical SciencesUniversity of TokushimaTokushimaJapan
  2. 2.Kitami Institute of TechnologyKitamiJapan

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