TrimetrexateFolic Acid AntagonistsQuinazolinesPteroylpolyglutamic AcidsTetrahydrofolate DehydrogenaseDeoxyuridineMethotrexateThymidine MonophosphatePhosphoribosyl PyrophosphateThymidylate SynthaseSodium AzideDrug ResistanceTetrahydrofolatesFolic AcidPhosphoribosylglycinamide FormyltransferaseDrug EvaluationGlucuronatesPolyglutamic Acid