title: Inhibition of nucleic acid synthesis by the di-n-butyl ester of methotrexate.
mesh_terms: D002460:Cell Line; D004273:DNA, Neoplasm / Q000096:biosynthesis*; D003857:Deoxyuridine / Q000378:metabolism; D004351:Drug Resistance; D008727:Methotrexate / Q000494:pharmacology*; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors
chemical_list: D004273:DNA, Neoplasm; D013936:Thymidine; D003857:Deoxyuridine; D008727:Methotrexate