AntimetabolitesAntimetabolites, AntineoplasticFloxuridineTetrahydrouridineTrabeculectomyInosine MonophosphatePhosphoribosyl PyrophosphateFluorouracilMitomycinMethotrexate6-MercaptopurineLeukemia L1210Folic Acid AntagonistsCytarabineAntineoplastic AgentsPurinesDrug SynergismDeoxycytidineToxicity TestsCell SurvivalDrug Screening Assays, AntitumorDrug Evaluation, PreclinicalNeoplasmsTumor Cells, CulturedCell CycleCell DivisionCell LineToxicity Tests, AcuteKinetics