AntimetabolitesAntimetabolites, AntineoplasticTetrahydrouridineTrabeculectomyFloxuridine6-MercaptopurineFluorouracilSurgical SpongesMethotrexateMitomycinCytarabineLeukemia L1210ThioguanineInosine MonophosphateDeoxycytidinePhosphoribosyl PyrophosphateVidarabine Phosphate6-AminonicotinamideAntineoplastic AgentsPantothenic AcidNorleucineDrug SynergismFolic Acid AntagonistsPurinesTumor Cells, CulturedNeoplasmsCell SurvivalCell DivisionPhosphonoacetic AcidAzathioprineThymidylate SynthaseDrug Screening Assays, AntitumorGuanineCell LineDrug Evaluation, PreclinicalStreptomycesCell CycleKinetics