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Phenolic compounds from Hypericum perforatum.

Guido Jürgenliemk1, Adolf Nahrstedt

  • 1Institute of Pharmaceutical Biology and Phytochemistry, Westfälische Wilhelms-University of Münster, Germany.

Planta Medica
|February 14, 2002
PubMed
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This study identified 22 phenolic compounds in St. John's wort (Hypericum perforatum L.), including a new natural product and several compounds previously unrecorded in this plant source. These findings enhance our understanding of the herb's chemical composition.

Area of Science:

  • Phytochemistry
  • Natural Product Chemistry
  • Analytical Chemistry

Background:

  • Re-investigation of St. John's wort (Hypericum perforatum L.) crude drug material.
  • Utilized High-Performance Liquid Chromatography (HPLC) for detection and quantification.
  • Focused on the identification and structural elucidation of phenolic compounds.

Discussion:

  • Detailed analysis of phenolic constituents in Hypericum perforatum.
  • Structural identification of isolated compounds using spectroscopic methods.
  • Comparison of findings with previous reports on St. John's wort phytochemistry.

Key Insights:

  • A novel natural product, quercetin-3-O-(2"-O-acetyl)-beta-D-galactoside, was isolated and identified.
  • Six phenolic compounds (cryptochlorogenic acid, protocatechuic acid, 3-O-[Z]-p-coumaroylquinic acid, isoorientin, cyanidin-3-O-alpha-L-rhamnoside, and astilbin) were reported for the first time from this plant.

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  • Confirmation of previously suspected compounds including neochlorogenic acid, 3-O-[E]-p-coumaroylquinic acid, mangiferin, miquelianin, and guaijaverin.

    • Outlook:

    • Further research into the biological activities of identified phenolic compounds.
    • Potential for St. John's wort as a source for novel therapeutic agents.
    • Importance of detailed phytochemical analysis for quality control of herbal medicines.