title: 2,4-Diamino-6-pteridinecarboxaldehyde and an azobenzene derivative are produced by UV photodegradation of methotrexate.
mesh_terms: D008727:Methotrexate / Q000528:radiation effects*; D010782:Photolysis; D011621:Pteridines; D014466:Ultraviolet Rays
chemical_list: D011621:Pteridines; C050577:2,4-diamino-6-pteridinecarboxaldehyde; D008727:Methotrexate