title: New approaches to chemotherapy.
mesh_terms: D000284:Administration, Oral; D000630:Aminopterin / Q000008:administration & dosage / Q000494:pharmacology / Q000633:toxicity; D000818:Animals; D013293:Enterococcus faecalis / Q000201:enzymology; D005493:Folic Acid Antagonists / Q000008:administration & dosage* / Q000633:toxicity; D007274:Injections, Intraperitoneal; D007928:Lethal Dose 50; D007939:Leukemia L1210 / Q000188:drug therapy*; D008727:Methotrexate / Q000008:administration & dosage / Q000494:pharmacology / Q000633:toxicity; D051379:Mice; D008815:Mice, Inbred Strains; D011799:Quinazolines / Q000008:administration & dosage / Q000494:pharmacology / Q000633:toxicity
chemical_list: D005493:Folic Acid Antagonists; D011799:Quinazolines; D000630:Aminopterin; D008727:Methotrexate