Structural determination of silymins A and B, new pentacyclic triterpenes from Silybum marianum, by 1D and 2D NMR spectroscopy

Magn Reson Chem. 2007 Jan;45(1):79-81. doi: 10.1002/mrc.1881.

Abstract

Silymins A (1) and B (2), the new pentacyclic triterpenes, have been isolated from ethyl acetate fraction of Silybum marianum and their structures assigned from 1H and 13C NMR spectra, DEPT and by 2D COSY, NOE and HMBC experiments.

MeSH terms

  • Cyclization
  • Hydrogen
  • Magnetic Resonance Spectroscopy / methods
  • Reference Standards
  • Silybum marianum / chemistry*
  • Triterpenes / chemistry*
  • Triterpenes / isolation & purification

Substances

  • Triterpenes
  • silymin A
  • silymin B
  • Hydrogen