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Triterpenoid glycosides from Schefflera lucantha

O Pancharoen1, P Tuntiwachwuttikul, W C Taylor

  • 1Department of Organic Chemistry, University of Sydney, NSW, Australia.

Phytochemistry
|March 1, 1994
PubMed
Summary

Three novel triterpenoid glycosides were identified in Schefflera lucantha Viguier leaves. Spectroscopic analysis confirmed their unique structures, expanding knowledge of plant-derived compounds.

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Area of Science:

  • Natural Product Chemistry
  • Phytochemistry
  • Organic Chemistry

Background:

  • Schefflera species are known sources of bioactive compounds.
  • Triterpenoid glycosides possess diverse pharmacological properties.
  • Isolation of novel compounds contributes to understanding plant chemical diversity.

Purpose of the Study:

  • To isolate and characterize new triterpenoid glycosides from Schefflera lucantha.
  • To elucidate the structures of these novel compounds using spectroscopic methods.

Main Methods:

  • Extraction and isolation of compounds from Schefflera lucantha leaves.
  • Structure elucidation using 1D and 2D Nuclear Magnetic Resonance (NMR) spectroscopy.
  • Mass spectrometry for molecular weight determination.

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Main Results:

  • Three new triterpenoid glycosides were successfully isolated.
  • The structures were determined as 3-O-[alpha-L-rhamnopyranosyl (1-->2)-beta-D-glucopyranosyl (1-->2)-beta-D-glucuronopyranosyl] betulinic acid, 3-O-[alpha-L-rhamnopyranosyl (1-->2)-beta-D-xylopyranosyl (1-->2)-beta-D-glucuronopyranosyl]betulinic acid, and 3-O-[alpha-L-rhamnopyranosyl(1-->2)-beta-D-glucopyranosyl (1-->2)-beta-D-glucuronopyranosyl]oleanolic acid.
  • Detailed spectroscopic data, particularly 2D NMR, was crucial for structural assignment.

Conclusions:

  • The study successfully identified and characterized three novel triterpenoid glycosides from Schefflera lucantha.
  • These findings expand the known chemical constituents of the Schefflera genus.
  • The elucidated structures provide a basis for further investigation into the biological activities of these compounds.