AntimetabolitesAntimetabolites, AntineoplasticTetrahydrouridineFloxuridineTrabeculectomyInosine MonophosphatePhosphoribosyl PyrophosphateFluorouracilMitomycinMethotrexateLeukemia L12106-MercaptopurineFolic Acid AntagonistsCytarabinePurinesAntineoplastic AgentsDrug SynergismCell SurvivalDrug Screening Assays, AntitumorNeoplasmsDeoxycytidineTumor Cells, CulturedCell CycleCell DivisionDrug Evaluation, PreclinicalCell LineKinetics