Two new triterpenoid saponins from the leaves of Ilex kudingcha

J Asian Nat Prod Res. 2012;14(4):308-13. doi: 10.1080/10286020.2011.653347.

Abstract

Two new triterpene saponins, ilekudinchosides F (1) and G (2), along with three known saponins were isolated from the leaves of Ilex kudingcha C. J. Tseng. The new compounds were characterized as 3β,19α-dihydroxy-12α-ethoxy-urs-13(18)-ene-28,20β-lactone-3-O-[β-D-glucopyranosyl(1 → 3)]-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (1) and 3β,19α-dihydroxy-12α-methoxy-urs-13(18)-ene-28,20β-lactone-3-O-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (2). The new structures were elucidated by spectroscopic methods including 1D and 2D NMR, HR-TOF-MS, and CD spectrometry, and the known compounds were identified by the comparison of their NMR and HR-TOF-MS data with those reported in the literature.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Drugs, Chinese Herbal / chemistry
  • Drugs, Chinese Herbal / isolation & purification*
  • Ilex / chemistry*
  • Molecular Structure
  • Nuclear Magnetic Resonance, Biomolecular
  • Plant Leaves / chemistry
  • Saponins / chemistry
  • Saponins / isolation & purification*
  • Triterpenes / chemistry
  • Triterpenes / isolation & purification*

Substances

  • Drugs, Chinese Herbal
  • Saponins
  • Triterpenes
  • ilekudinchoside F
  • ilekudinchoside G