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Iridoids from Lippia graveolens.

L Rastrelli1, A Caceres, C Morales

  • 1Dipartimento di Scienze Farmaceutiche, Università di Salerno, Piazza V. Emanuele 9, 84084 Penta, Salerno, Italy

Phytochemistry
|November 17, 2001
PubMed
Summary

Researchers identified ten iridoid and secoiridoid glucosides from Lippia graveolens leaves. Novel compounds, caryoptosidic acid and lippioside I and II, were characterized using NMR spectroscopy.

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Area of Science:

  • Phytochemistry
  • Natural Product Chemistry
  • Organic Chemistry

Background:

  • Lippia graveolens is a plant species with potential medicinal properties.
  • Iridoid and secoiridoid glucosides are known classes of bioactive natural products.

Purpose of the Study:

  • To investigate the chemical constituents of Lippia graveolens leaves from Guatemala.
  • To isolate and characterize iridoid and secoiridoid glucosides and their derivatives.

Main Methods:

  • Extraction and isolation of compounds from plant material.
  • Structure elucidation using Nuclear Magnetic Resonance (NMR) spectroscopy.

Main Results:

  • Ten iridoid and secoiridoid glucosides were identified.

Related Experiment Videos

  • Minor constituents included loganin, secologanin, and caryoptoside.
  • Major constituents were novel iridoids: caryoptosidic acid and lippioside I and II, characterized by esterification with p-coumaroyl or caffeoyl residues.

    • Conclusions:

    • The study successfully isolated and characterized novel iridoid compounds from Lippia graveolens.
    • NMR spectroscopy proved effective for elucidating the structures of these complex natural products.