New triterpenoid saponins from Stelmatocrypton khasianum

Chem Pharm Bull (Tokyo). 2003 May;51(5):574-8. doi: 10.1248/cpb.51.574.

Abstract

Four new triterpenoid saponins, designated as stelmatotriterpenosides E-H (1-4), together with three known compounds, asterbatanoside B (5), 2alpha,3beta,19alpha,23-tetrahydroxy-olean-12-en-28-oic acid-3-O-beta-D-glucopyranosyl-28-O-beta-D-glucopyranosyl ester (6) and 2alpha,3beta,19alpha,23-tetrahydroxy-urs-12-en-28-oic acid-3-O-beta-D-glucopyranosyl-28-O-beta-D-glucopyranosyl ester (7), were isolated from the stems of Stelmatocrypton khasianum. On the basis of chemical and spectral evidence, the structures of 1-4 were established as 2alpha,3beta,23-trihydroxy-olean-12-en-28-oic acid-3-O-beta-D-glucopyranosyl-28-O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester (1), 2alpha,3beta,23-trihydroxy-urs-12-en-28-oic acid-3-O-beta-D-glucopyranosyl-28-O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester (2), 2alpha,3beta,19alpha-trihydroxy-urs-12-en-28-oic acid-3-O-beta-D-glucopyranosyl-28-O-beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosyl ester (3), and 2beta,3beta,19alpha-trihydroxy-urs-12-en-24,28-dioic acid-24-O-beta-D-glucopyranosyl-28-O-beta-D-glucopyranosyl diester (4).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Apocynaceae / chemistry*
  • China
  • Chromatography, Thin Layer
  • Hydrolysis
  • Magnetic Resonance Spectroscopy
  • Mass Spectrometry
  • Saponins / chemistry*
  • Saponins / isolation & purification
  • Solvents
  • Triterpenes / chemistry*
  • Triterpenes / isolation & purification

Substances

  • Saponins
  • Solvents
  • Triterpenes