Xanthine OxidaseXanthineXanthine DehydrogenaseXanthinesAllopurinolOxypurinolMolybdenumHypoxanthineHypoxanthinesAldehyde OxidasePteridinesUric AcidKetone OxidoreductasesFree RadicalsMilkSuperoxidesMolecular StructurePurinesOxidation-ReductionTungstenStructure-Activity RelationshipKineticsSulfur CompoundsVolatile Organic CompoundsHydroxidesTungsten CompoundsSuperoxide DismutaseEnzyme InhibitorsPlant ExtractsElectron Spin Resonance SpectroscopyChromatography, High Pressure LiquidFree Radical ScavengersDose-Response Relationship, DrugHydrogen PeroxideHydroxyl RadicalCoenzymesTheobromineCattleSulfhydryl CompoundsFlavin-Adenine DinucleotideMetalloproteinsReactive Oxygen SpeciesDrug Evaluation, PreclinicalMagnetic Resonance SpectroscopyUrate OxidaseOxygenBiphenyl CompoundsPhenolsCatalaseAntioxidantsLiverNitroso CompoundsNADDithioniteHeterocyclic CompoundsInhibitory Concentration 50Small Molecule LibrariesOrganotin CompoundsSpectrophotometryNucleobase Transport ProteinsGuanine DeaminaseOxidative StressOrganometallic CompoundsAniline CompoundsSpiro CompoundsHydrogen-Ion ConcentrationChemistryNitric OxideRats, Sprague-DawleySulfurNitrogen CompoundsChemical PhenomenaBenzaldehydesSpectrophotometry, UltravioletAdenosinePterinsTheophyllineStereoisomerismAldehyde OxidoreductasesBiotransformationCells, CulturedCyclic N-OxidesDrug DesignSubstrate SpecificityOxidoreductasesPentosyltransferasesMolecular Sequence DataPurine-Pyrimidine Metabolism, Inborn ErrorsOrganoselenium CompoundsModels, ChemicalDrug Screening Assays, AntitumorBinding SitesRats, WistarReceptors, PurinergicOrganophosphorus CompoundsIronTime FactorsAzo CompoundsFlavinsNADPH Oxidase