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Dihydroramulosin from Botrytis sp

D B Stierle1, A A Stierle, A Kunz

  • 1Department of Chemistry, Montana Tech of the University of Montana, Butte, Montana 59701, USA. DSTIERLE@MTECH.EDU

Journal of Natural Products
|October 24, 1998
PubMed
Summary

Researchers identified three compounds, including a new one named 8-dihydroramulosin, produced by Botrytis sp. fungi from Pacific yew bark. The new compound

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Area of Science:

  • * Mycology and Natural Product Chemistry.
  • * Phytochemistry and Chemical Ecology.

Background:

  • * The Pacific yew (Taxus brevifolia) is a source of unique natural products.
  • * Fungal endophytes can produce bioactive secondary metabolites.

Purpose of the Study:

  • * To investigate the secondary metabolites produced by Botrytis sp. isolated from Taxus brevifolia.
  • * To identify and characterize novel compounds from this fungal-plant interaction.

Main Methods:

  • * Isolation and cultivation of Botrytis sp. from the inner bark of Taxus brevifolia.
  • * Structure elucidation of isolated compounds using Nuclear Magnetic Resonance (NMR) spectroscopy.
  • * Chemical conversion experiments to confirm structural assignments.

Main Results:

  • * Three compounds were isolated: ramulosin (1), 6-hydroxyramulosin (2), and a new compound, 8-dihydroramulosin (3).
  • * The structure of 8-dihydroramulosin was determined via comprehensive NMR analysis.
  • * Chemical conversion confirmed the structure of 8-dihydroramulosin from ramulosin.

Conclusions:

  • * Botrytis sp. from Taxus brevifolia produces known and novel ramulosin derivatives.
  • * 8-dihydroramulosin represents a new natural product with potential for further investigation.
  • * This study expands the known chemical diversity of fungal endophytes associated with medicinal plants.

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