Six new dammarane-type triterpene saponins from the leaves of Panax ginseng

Chem Pharm Bull (Tokyo). 2001 Apr;49(4):442-6. doi: 10.1248/cpb.49.442.

Abstract

Six new minor saponins, together with known ginsenosides, were isolated from the leaves of Panax ginseng. The new saponins were named as ginsenoside-Rh5, -Rh6, -Rh7 -Rh8, -Rh9 and -Rg7, and their structures were elucidated on the basis of chemical and physicochemical evidence to be as follows: ginsenoside-Rh5: 3beta,6alpha,12beta,24zeta-tetrahydroxy-dammar-20(22),25-diene 6-O-beta-D-glucopyranoside (1), -Rh6: 3beta,6alpha12beta,20(S)-tetrahydroxy-25-hydroperoxy-dammar-23-ene 20-O-beta-D-glucopyranoside (2), -Rh7: 3beta,7beta,12beta,20(S)-tetrahydroxy-dammar-5,24-diene 20-O-beta-D-glucopyranoside (3), -Rh8: 3beta,6alpha,20(S)-trihydroxy-dammar-24-ene-12-one 20-O-beta-D-glucopyranoside (4), -Rh9: 3beta,6alpha,20(S)-trihydroxy-12beta,23-epoxy-dammar-24-ene 20-O-beta-D-glucopyranoside (5) and -Rg7: 3-O-beta-D-glucopyranosyl 3beta,12beta,20(S),24(R)-tetrahydroxy-dammar-25-ene 20-O-beta-D-glucopyranoside (6).

MeSH terms

  • Chemical Phenomena
  • Chemistry, Physical
  • Dammaranes
  • Hydrolysis
  • Magnetic Resonance Spectroscopy
  • Panax / chemistry*
  • Plant Extracts / analysis
  • Plant Leaves / chemistry
  • Plants, Medicinal*
  • Saponins / chemistry*
  • Saponins / isolation & purification
  • Spectrometry, Mass, Fast Atom Bombardment
  • Steroids / chemistry*
  • Steroids / isolation & purification
  • Triterpenes / chemistry*
  • Triterpenes / isolation & purification

Substances

  • Plant Extracts
  • Saponins
  • Steroids
  • Triterpenes