title: [CHEMICAL STRUCTURE AND BIOSYNTHESIS OF NATURALLY-OCCURRING PTERIDINES].
mesh_terms: D002626:Chemistry, Pharmaceutical; D008660:Metabolism; D011621:Pteridines; D011622:Pterins
chemical_list: D011621:Pteridines; D011622:Pterins
keywords: CHEMISTRY, PHARMACEUTICAL; METABOLISM; PTERINS; REVIEW