Antioxidant xanthones from Garcinia vieillardii

J Nat Prod. 2004 Apr;67(4):707-9. doi: 10.1021/np0304971.

Abstract

Two new xanthones, 6-O-methyl-2-deprenylrheediaxanthone B (1) and vieillardixanthone (2), were isolated from the stem bark of Garcinia vieillardii, as were four known compounds (4-7). The structures of 1 and 2 were determined by means of spectroscopic analysis and chemical derivatization. Each isolate was tested for its antioxidant properties based on a scavenging activity study using the stable 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical.

MeSH terms

  • Antioxidants / chemistry
  • Antioxidants / isolation & purification*
  • Antioxidants / pharmacology*
  • Biphenyl Compounds
  • Free Radical Scavengers / chemistry
  • Free Radical Scavengers / isolation & purification*
  • Free Radical Scavengers / pharmacology*
  • Garcinia / chemistry*
  • Molecular Structure
  • New Caledonia
  • Nuclear Magnetic Resonance, Biomolecular
  • Picrates / pharmacology
  • Plant Bark / chemistry
  • Plants, Medicinal / chemistry*
  • Xanthones / chemistry
  • Xanthones / isolation & purification*
  • Xanthones / pharmacology

Substances

  • 6-O-methyl-2-deprenylrheediaxanthone B
  • Antioxidants
  • Biphenyl Compounds
  • Free Radical Scavengers
  • Picrates
  • Xanthones
  • vieillardixanthone
  • 1,1-diphenyl-2-picrylhydrazyl