AntimetabolitesAntimetabolites, AntineoplasticTetrahydrouridineTrabeculectomySurgical Sponges6-MercaptopurineFloxuridineFluorouracilThioguanineMethotrexateMitomycinVidarabine Phosphate6-AminonicotinamideDeoxycytidineCytarabineLeukemia L1210Pantothenic AcidAntineoplastic AgentsNorleucineDrug SynergismInosine MonophosphateTumor Cells, CulturedNeoplasmsPhosphonoacetic AcidThymidylate SynthasePhosphoribosyl PyrophosphateAzathioprineDrug Screening Assays, AntitumorGuanineCell SurvivalCell DivisionStreptomycesFolic Acid AntagonistsPurinesCell LineXenograft Model Antitumor AssaysApoptosisDrug Evaluation, PreclinicalAntineoplastic Combined Chemotherapy ProtocolsCell CycleCell Line, TumorLeukemia P388Antibiotics, AntineoplasticMice, NudeSarcoma 180Neoplasms, ExperimentalKineticsNeoplasm TransplantationMelanoma, Experimental