ProdrugsEstersgamma-Glutamyl HydrolaseBiotransformationDrug StabilityCarboxylesteraseFlucytosineNitrogen Mustard CompoundsDrug Delivery SystemsMolecular StructureFloxuridineDrug DesignOrganophosphonatesAcyclovirBiological AvailabilityAziridinesHydrolysisCaco-2 CellsAntiviral AgentsPhosphoramide MustardsAntineoplastic AgentsCarboxylic Ester HydrolasesNucleosidesGanciclovirAniline MustardAmpyroneDrug Screening Assays, AntitumorGenetic TherapySolubilityAdenineInhibitory Concentration 50DipeptidesAdministration, OralChromatography, High Pressure LiquidGliosarcomaNucleoside DeaminasesChemistry Techniques, SyntheticBenzamidinesAzo CompoundsChemistry, PharmaceuticalCell Line, TumorThymidine KinaseSulfadimethoxineDrug CarriersOrganophosphatesAntimetabolites, AntineoplasticBiopharmaceuticsBystander EffectAntineoplastic Agents, AlkylatingTumor Cells, CulturedSulfamerazineMice, Nude