XanthonesGarcinia mangostanaClusiaceaeGarciniaCalophyllumGentianaceaeXanthenesBenzophenonesSwertiaPlant ExtractsPlant BarkInhibitory Concentration 50Molecular StructureSpectrometry, Mass, Electrospray IonizationDrug Screening Assays, AntitumorAntineoplastic Agents, PhytogenicChromatography, High Pressure LiquidMagnetic Resonance SpectroscopyCell Line, Tumor