title: Some considerations of folic acid antagonists.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D005492:Folic Acid / Q000378:metabolism; D005493:Folic Acid Antagonists / Q000494:pharmacology / Q000627:therapeutic use; D008727:Methotrexate / Q000627:therapeutic use; D009369:Neoplasms / Q000188:drug therapy
chemical_list: D005493:Folic Acid Antagonists; D005492:Folic Acid; D008727:Methotrexate