Antioxidant xanthones from Garcinia vieillardii.

  title={Antioxidant xanthones from Garcinia vieillardii.},
  author={Anne-Emmanuelle Hay and Marie-Christine Aumond and Sabine Mallet and Vincent Dumontet and Marc Litaudon and David Rondeau and Pascal Richomme},
  journal={Journal of natural products},
  volume={67 4},
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. 
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