Two new triterpene saponins from the anti-inflammatory saponin fraction of Ilex pubescens root

Chem Biodivers. 2008 Jul;5(7):1369-76. doi: 10.1002/cbdv.200890125.

Abstract

The saponin fraction from the ethanolic extracts of the root of Ilex pubescens Hook. et Arn. (Ilexaceae) was found to exhibit potent anti-inflammatory effects on carrageenan-induced paw edema in rats. Two novel triterpene saponins, pubescenosides C and D (1 and 2, resp.), together with five known saponins were isolated from this saponin fraction. The structures of 1 and 2 were elucidated as (20beta)-3-O-[beta-D-glucopyranosyl-(1-->2)-beta-D-xylopyranosyl]ursa-12,18-dien-28-oic acid 28-O-beta-D-glucopyranosyl ester, and (20beta)-3-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranosyl-(1-->2)-beta-D-xylopyranosyl]ursa- 12,18-dien-28-oic acid 28-O-beta-D-glucopyranosyl ester, respectively, on the basis of chemical and spectroscopic data. Five known saponins isolated from the saponin fraction were identified as ilexsaponin B(1), B(2), B(3), A(1), and chikusetsusaponin IV(a).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Anti-Inflammatory Agents / isolation & purification*
  • Anti-Inflammatory Agents / therapeutic use
  • Carrageenan
  • Edema / chemically induced
  • Edema / drug therapy
  • Ilex / chemistry*
  • Nuclear Magnetic Resonance, Biomolecular
  • Plant Roots / chemistry*
  • Rats
  • Saponins / chemistry
  • Saponins / isolation & purification*
  • Saponins / therapeutic use

Substances

  • Anti-Inflammatory Agents
  • Saponins
  • pubescenoside C
  • pubescenoside D
  • Carrageenan