Isolation and structure determination of three triterpenes from bark resin of juvenile European white birch

Hannu Taipale, Jouko Vepsäläinen, Reino Laatikainen, Paul Reichardt, Seppo Lapinjoki (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

3alpha-O-Malonyl-12beta-O-acetyl-25-hydroxy-(20S,24R)-epoxydammarane (papyriferic acid) and two previously unknown dammarane triterpenes were identified from diethylether extracts of bark resin from juvenile Betula pendula. H-1 and C-13 NMR spectroscopy showed that a compound appearing often in chromatographic analyses in amounts comparable with papyriferic acid is its 3beta-epimer. The third compound which is abundant in individuals with low levels of the other two compounds was shown to be 3beta-O-malonyl-12beta-O-acetyl-20(S)-hydroxydammar-24-ene (pendulic acid), i.e. an analogue of the 3beta-epimer of papyriferic acid with open and partially reduced C-17 side chain.
Original languageEnglish
Pages (from-to)755-758
JournalPhytochemistry
Volume34
Issue number3
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

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