AntimetabolitesAntimetabolites, AntineoplasticTetrahydrouridineFloxuridineTrabeculectomyInosine MonophosphatePhosphoribosyl PyrophosphateFluorouracilMitomycin6-MercaptopurineMethotrexateLeukemia L1210Folic Acid AntagonistsCytarabinePurinesAntineoplastic AgentsDrug SynergismDrug Screening Assays, AntitumorDeoxycytidineDrug Evaluation, PreclinicalCell SurvivalTumor Cells, CulturedNeoplasmsCell CycleCell DivisionCell LineKinetics