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Saponins from Trifolium repens.

S Sakamoto1, S Kofuji, M Kuroyanagi

  • 1School of Pharmaceutical Sciences, University of Shizuoka, Japan.

Phytochemistry
|May 1, 1992
PubMed
Summary

Researchers isolated five new triterpenoid saponins, named cloversaponins I-V, from white clover (Trifolium repens). Their structures were confirmed using advanced NMR spectroscopy and chemical analysis.

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Area of Science:

  • Phytochemistry
  • Natural Product Chemistry

Background:

  • White clover (Trifolium repens) is a widely distributed plant.
  • Saponins are a diverse class of natural compounds with various biological activities.

Purpose of the Study:

  • To isolate and characterize novel triterpenoid saponins from white clover.
  • To identify known saponins present in the plant extract.

Main Methods:

  • Extraction of compounds from the whole plant of Trifolium repens.
  • Structure elucidation using 2H Nuclear Magnetic Resonance (NMR) and 13C NMR spectroscopy.
  • Confirmation of structures through chemical evidence.

Main Results:

  • Five new triterpenoid saponins, designated cloversaponins I-V, were isolated.
  • Four known saponins (beta-D-glucoronopyranosylsoyasapogenol B, soyasaponin I, soyasaponin II, and azukisaponin II methyl esters) were also identified.
  • The chemical structures of the new compounds were fully determined.

Conclusions:

  • The study successfully identified novel and known saponins from Trifolium repens.
  • The findings contribute to the understanding of the phytochemical profile of white clover.
  • The isolated saponins may serve as leads for further pharmacological investigations.

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