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Related Experiment Videos

Lignans from Phyllanthus urinaria.

Chia-Chuan Chang1, Yu-Chin Lien, Karin C S Chen Liu

  • 1School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan, ROC.

Phytochemistry
|July 25, 2003
PubMed
Summary
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Phyllanthus urinaria L. yielded four new lignans and nine known ones. Researchers identified their structures and stereochemistry using advanced spectral analysis and chemical methods.

Area of Science:

  • Phytochemistry
  • Natural Product Chemistry
  • Organic Chemistry

Background:

  • Phyllanthus urinaria L. is a plant species known for its diverse phytochemical constituents.
  • Lignans are a class of phenolic compounds with various reported biological activities.
  • Previous research has indicated the presence of bioactive compounds in Phyllanthus species.

Purpose of the Study:

  • To conduct a comprehensive chemical investigation of Phyllanthus urinaria L.
  • To isolate and characterize novel lignan compounds from the plant.
  • To elucidate the structures and absolute stereochemistry of the isolated lignans.

Main Methods:

  • Extraction and isolation of compounds from aerial and root parts of Phyllanthus urinaria L.
  • Structure elucidation using Nuclear Magnetic Resonance (NMR) spectroscopy (1D and 2D NMR).

Related Experiment Videos

  • Determination of absolute stereochemistry through Circular Dichroism (CD) analysis and chemical correlation.

    • Main Results:

    • Isolation of four new lignans: 5-demethoxyniranthin, urinatetralin, dextrobursehernin, and urinaligran.
    • Identification of nine known lignans co-occurring in the plant extracts.
    • Complete structural and stereochemical assignment for all isolated compounds.

    Conclusions:

    • The chemical study of Phyllanthus urinaria L. has expanded the knowledge of its lignan profile.
    • The identified compounds, particularly the new lignans, may possess significant biological properties.
    • This research provides a foundation for further pharmacological investigations of Phyllanthus urinaria L. constituents.