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A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products
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Published on: October 4, 2019

Terpenoids from Toona ciliata.

Hua-Dong Chen1, Sheng-Ping Yang, Yan Wu

  • 1State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Zhangjiang Hi-Tech Park, Shanghai, People's Republic of China.

Journal of Natural Products
|March 12, 2009
PubMed
Summary

Researchers isolated novel norlimonoids, triterpenoids, and diterpenoids from Toona ciliata. One compound, toonaciliatin M, demonstrated moderate antifungal activity against Trichophyton rubrum.

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Area of Science:

  • Natural Product Chemistry
  • Phytochemistry
  • Medicinal Chemistry

Background:

  • Toona ciliata, a plant species, is a potential source of bioactive natural products.
  • Previous research has identified various compounds from the Toona genus, highlighting its chemical diversity.

Purpose of the Study:

  • To isolate and characterize new chemical constituents from the leaves and twigs of Toona ciliata.
  • To evaluate the antifungal activity of the isolated compounds.

Main Methods:

  • Extraction and isolation of compounds from Toona ciliata using chromatographic techniques.
  • Structure elucidation of the isolated compounds based on comprehensive spectroscopic data (e.g., NMR, MS).
  • Antifungal activity testing using microdilution methods against Trichophyton rubrum.

Main Results:

  • Isolation of three new norlimonoids (compounds 1-3), two new tirucallane-type triterpenoids (compounds 4-5), and one new pimaradiene-type diterpenoid (compound 6).
  • Identification of two known limonoids and eight known tirucallane-type triterpenoids.
  • Toonaciliatin M (compound 6) exhibited moderate antifungal activity against Trichophyton rubrum, with a Minimum Inhibitory Concentration (MIC) of 12.5 microg/mL.

Conclusions:

  • The study successfully identified novel limonoid, triterpenoid, and diterpenoid compounds from Toona ciliata.
  • Toonaciliatin M is a promising compound with potential antifungal properties against dermatophytes like Trichophyton rubrum.
  • Further investigation into the structure-activity relationship and mechanism of action of toonaciliatin M is warranted.