ProdrugsEstersDrug StabilityBiotransformationAniline MustardAmpyroneDrug DesignFloxuridineMolecular StructureDrug Delivery SystemsAcyclovirCaco-2 CellsHydrolysisNucleosidesOrganophosphonatesgamma-Glutamyl HydrolaseSulfadimethoxineDipeptidesChemistry Techniques, SyntheticBiopharmaceuticsSulfamerazineSolubilityAntiviral AgentsBiological AvailabilityNitroreductasesPhosphoramide MustardsCarboxylesteraseAdenineInhibitory Concentration 50Carboxylic Ester HydrolasesAntineoplastic AgentsDrug Screening Assays, AntitumorPhosphoric AcidsPharmaceutic AidsEnkephalin, Leucine-2-AlanineChromatography, High Pressure Liquid