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Terpenes from Inula verbascifolia.

Ahmed A Ahmed1, Abou El-Hamd H Mohamed, Olga Tzakou

  • 1Department of Chemistry, Faculty of Science, El-Minia University, El-Minia 61519, Egypt. abdellaahmed@yahoo.com

Phytochemistry
|March 22, 2003
PubMed
Summary
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Researchers identified two new xanthanes and a germacranolide derivative from Inula verbascifolia aerial parts. Known compounds were also isolated, with structures confirmed using advanced spectral analysis.

Area of Science:

  • Phytochemistry
  • Natural Product Chemistry
  • Organic Chemistry

Background:

  • Inula verbascifolia is a plant species known for its potential medicinal properties.
  • Previous research has explored the chemical constituents of various Inula species.

Purpose of the Study:

  • To isolate and characterize novel chemical compounds from the aerial parts of Inula verbascifolia.
  • To elucidate the structures of these new compounds and known related compounds.

Main Methods:

  • Extraction and isolation of compounds from plant material.
  • Structure elucidation using comprehensive spectroscopic techniques, including Infrared (IR) spectroscopy, High-Resolution Mass Spectrometry (HRMS), and various Nuclear Magnetic Resonance (NMR) experiments (1H NMR, 13C NMR, DEPT, 1H-1H COSY, HMQC, HMBC).

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Main Results:

  • Isolation and identification of two new xanthane compounds.
  • Isolation and identification of one new germacranolide derivative.
  • Confirmation of the presence of known compounds: inusoniolide, 4-O-dihydroinusoniolide, and 9beta-hydroxyparthenolide.
  • Detailed structural assignments based on extensive spectral data.

Conclusions:

  • The aerial parts of Inula verbascifolia are a rich source of diverse sesquiterpenoids.
  • The identified compounds, including novel xanthanes and germacranolides, contribute to the known chemical profile of the Inula genus.
  • The study provides valuable structural information for these natural products, potentially aiding in future pharmacological investigations.