Antiproliferative constituents of the roots of conyza canadensis

Boglárka Csupor-Löffler, Zsuzsanna Hajdú, István Zupkó, Judit Molnár, Peter Forgo, Andrea Vasas, Zoltán Kele, Judit Hohmann

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32 Citations (Scopus)


Bioassay-guided fractionation of the n-hexane and CHCl3 phases of the methanol extract of the roots of Conyza canadensis (L.) Cronquist led to the isolation of two new dihydropyranones named conyzapyranone A (1) and B (2), and the known 4Z,8Z-matricaria-γ-lactone (3), 4E,8Z-matricaria-γ- lactone (4), 9,12,13-trihydroxy-10(E)-octadecenoic acid (5), epifriedelanol (6), friedeline (7), taraxerol (8), simiarenol (9), spinasterol (10), stigmasterol, β-sitosterol, and apigenin. The structures were determined by means of ESIMS and 1D and 2DNMR spectroscopy, including 1H-1H COSY, NOESY, HSQC, and HMBC experiments. The isolated compounds were evaluated for their antiproliferative activities and were demonstrated to exert considerable cell growth-inhibitory activity against human cervix adenocarcinoma (HeLa), skin carcinoma (A431), and breast adenocarcinoma (MCF-7) cells. Some of the active components, including 2, 4, and 10, proved to be substantially more potent against these cell lines than against noncancerous human foetal fibroblasts (MRC-5) and can therefore be considered selective antiproliferative natural products.

Original languageEnglish
Pages (from-to)1183-1188
Number of pages6
JournalPlanta Medica
Issue number11
Publication statusPublished - Feb 7 2011



  • 2DNMR
  • Asteraceae
  • B
  • Conyza canadensis
  • antiproliferative activity
  • conyzapyranone A

ASJC Scopus subject areas

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry

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