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Diterpenoids from isodon eriocalyx

Chen1, Yue, Chen

  • 1Shanghai Institute of Materia Medica, Academia Sinica, Shanghai 200031, People's Republic of China, Laboratory of Phytochemistry, Kunming Institute of Botany, Academia Sinica, Kunming 650204, People's Republic of China, and Department of.

Journal of Natural Products
|May 29, 1999
PubMed
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Three new diterpenoids, named eriocalyxins C-E, were isolated from Isodon eriocalyx. Their chemical structures were identified using advanced spectroscopic methods, including NMR.

Area of Science:

  • Natural Product Chemistry
  • Organic Chemistry
  • Phytochemistry

Background:

  • Isodon eriocalyx is a plant species known for its diverse chemical constituents.
  • Diterpenoids are a class of natural products with a wide range of biological activities.
  • The isolation of new compounds from medicinal plants contributes to the discovery of novel therapeutic agents.

Purpose of the Study:

  • To isolate and characterize new diterpenoids from Isodon eriocalyx.
  • To elucidate the chemical structures of the isolated compounds using spectroscopic techniques.

Main Methods:

  • Isolation of compounds using chromatographic techniques.
  • Structure elucidation using one-dimensional (1D) and two-dimensional (2D) Nuclear Magnetic Resonance (NMR) spectroscopy.

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  • Analysis of spectroscopic data to determine the exact chemical structures.

    • Main Results:

    • Three new diterpenoids, designated eriocalyxins C-E (compounds 1-3), were successfully isolated from Isodon eriocalyx.
    • The chemical structures of eriocalyxins C-E were fully elucidated.
    • Compound 1: 6beta-hydroxy-15beta-acetoxy-3alpha,20-epoxy-16beta, 17-epoxy-ent-kaur-1,7-dione.
    • Compound 2: 1alpha,7beta-dihydroxy-6beta, 15beta-diacetoxy-7,20-epoxy-ent-kaur-16-ene.
    • Compound 3: 15beta-acetoxy-1,6-dioxo-6,7-seco-ent-kaur-2,16-dien-7,20-olide.

    Conclusions:

    • The study successfully identified three novel diterpenoids from Isodon eriocalyx.
    • The structural elucidation was confirmed through comprehensive spectroscopic analysis.
    • These findings expand the knowledge of the chemical diversity of Isodon eriocalyx diterpenoids.