Antioxidant xanthones from Garcinia vieillardii.

@article{Hay2004AntioxidantXF,
  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},
  year={2004},
  volume={67 4},
  pages={
          707-9
        }
}
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. 
Antileishmanial polyphenols from Garcinia vieillardii.
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Seven xanthones, the new vieillardiixanthone B and C and (7), pancixanthones A (2), B (3), 1,6-dihydroxyxanthone (6), pyranojacareubin and 5, 6-O-dimethyl-2-deprenylrheediaxanthones together with two benzophenones were isolated from the stem bark of the neocaledonian Garcinia vieillardii.
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A new xanthone, calothorexanthone was isolated from a petroleum ether extract of the bark of Calophyllum thorelii and some exhibited remarkable effects with IC50 of 13.63–17.46 µg mL−1.
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A tetraoxygenated xanthone, 1,7-dihidroxy-3-methoxy-4-(3methylbut-2-enyl),6’,6’ –dimethylpyrano (2’ , 3’ : 5, 6) xanthone had been isolated from the ethyl acetate extract of the stem bark of Garcinia
Prenylated Xanthones from the Bark of Garcinia xanthochymus and Their 1,1-Diphenyl-2-picrylhydrazyl (DPPH) Radical Scavenging Activities
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One new prenylated xanthone named banfoxanthone is isolated from Garcinia ovalifolia and others species of genus Garcinia appear to be useful as chemotaxonomic markers in Garcinia.
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