title: Electron spin resonance of pteridine radicals and the structure of hydropteridines.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D004578:Electron Spin Resonance Spectroscopy; D010084:Oxidation-Reduction; D011621:Pteridines; D011622:Pterins; D013237:Stereoisomerism
chemical_list: D011621:Pteridines; D011622:Pterins