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Three new limonoids from Cipadessa cinerascens.

Xiao-Hong Yuan1, Bo-Gang Li, Chun-Xia Xu

  • 1College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, PR China.

Chemical & Pharmaceutical Bulletin
|June 2, 2007
PubMed
Summary

Researchers discovered three new limonoids, named cipadesins D-F, from the Cipadessa cinerascens plant. These compounds, along with known natural products, were identified using spectral and crystallographic analysis.

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Area of Science:

  • Natural Product Chemistry
  • Phytochemistry
  • Organic Chemistry

Background:

  • Cipadessa cinerascens is a plant species known for its potential medicinal properties.
  • Limonoids are a class of naturally occurring compounds with diverse biological activities.
  • Previous research has explored the chemical constituents of various plant species.

Purpose of the Study:

  • To isolate and characterize new chemical compounds from Cipadessa cinerascens.
  • To elucidate the structures of novel limonoids and other natural products.
  • To contribute to the understanding of the phytochemical diversity of Cipadessa species.

Main Methods:

  • Extraction of compounds from the leaves and bark of Cipadessa cinerascens.
  • Purification of isolated compounds using chromatographic techniques.

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  • Structure elucidation through comprehensive spectral analysis (NMR, MS).
  • Confirmation of a key compound's structure via X-ray crystallographic analysis.

    • Main Results:

    • Isolation and identification of three new limonoids, designated cipadesins D--F (compounds 1--3).
    • Co-isolation of known compounds: 8,15-dihydroxy-13E-labdane, beta-sitosterol, and beta-daucosterol.
    • Structural determination of the new compounds based on extensive spectroscopic data.
    • X-ray crystallographic analysis unequivocally confirmed the structure of cipadesin D (compound 1).

    Conclusions:

    • The phytochemical investigation of Cipadessa cinerascens led to the discovery of novel limonoids.
    • The identified compounds expand the known chemical diversity of this plant species.
    • The structural elucidation provides a basis for further pharmacological evaluation of these natural products.