AntimetabolitesAntimetabolites, AntineoplasticTetrahydrouridineTrabeculectomyFloxuridine6-MercaptopurineFluorouracilMethotrexateMitomycinSurgical SpongesLeukemia L1210Antineoplastic AgentsCytarabineThioguanineDeoxycytidineInosine MonophosphateDrug Screening Assays, AntitumorVidarabine PhosphatePhosphoribosyl Pyrophosphate6-AminonicotinamideDrug SynergismTumor Cells, CulturedNeoplasmsPantothenic AcidFolic Acid AntagonistsNorleucineCell SurvivalPurinesCell DivisionPhosphonoacetic AcidThymidylate SynthaseXenograft Model Antitumor AssaysCell LineAzathioprineDrug Evaluation, PreclinicalGuanineStreptomycesCell CycleKineticsApoptosisCell Line, TumorAntibiotics, AntineoplasticLeukemia P388Mice, NudeAntineoplastic Combined Chemotherapy ProtocolsStructure-Activity RelationshipNeoplasms, ExperimentalNeoplasm TransplantationSarcoma 180Melanoma, ExperimentalMolecular StructureMice, Inbred BALB CCancer Vaccines