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Two phenanthraquinones from Dendrobium moniliforme.

T H Lin1, S J Chang, C C Chen

  • 1Institute of Chinese Pharmaceutical Sciences, China Medical College, 91, Hsueh-Shih Road, Taichung 404, Taiwan, Republic of China.

Journal of Natural Products
|August 25, 2001
PubMed
Summary
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Two phenanthraquinones, moniliformin and denbinobin, were isolated from Dendrobium moniliforme stems. Moniliformin is a novel compound, while denbinobin exhibits potent anti-inflammatory effects.

Area of Science:

  • Natural Products Chemistry
  • Pharmacology

Background:

  • Dendrobium moniliforme is a medicinal plant with a history of traditional use.
  • Phenanthraquinones are a class of natural compounds with diverse biological activities.

Purpose of the Study:

  • To isolate and identify chemical constituents from Dendrobium moniliforme stems.
  • To investigate the biological activity of the isolated compounds.

Main Methods:

  • Phytochemical investigation of Dendrobium moniliforme stem extract.
  • Structure elucidation using spectral data interpretation (e.g., NMR, MS).
  • In vitro anti-inflammatory assays.

Main Results:

  • Two phenanthraquinones were isolated and identified: 2,6-dimethoxy-1,4,5,8-phenanthradiquinone (moniliformin) and 5-hydroxy-3,7-dimethoxy-1,4-phenanthraquinone (denbinobin).

Related Experiment Videos

  • Moniliformin (1) represents a novel structure with a 1,4,5,8-diquinone moiety within the phenanthraquinone skeleton.
  • Denbinobin (2) demonstrated significant in vitro anti-inflammatory activity.

    • Conclusions:

    • Dendrobium moniliforme is a source of unique phenanthraquinones.
    • Moniliformin is a newly identified natural product.
    • Denbinobin possesses promising anti-inflammatory properties warranting further investigation.