title: Purine N-oxides. XXXVI. The tautomeric structures of the 3-N-oxides of xanthine and guanine.
mesh_terms: D002273:Carcinogens; D003497:Cyclic N-Oxides; D006147:Guanine; D008745:Methylation; D009589:Nitrogen Oxides; D010087:Oxides; D013057:Spectrum Analysis; D014466:Ultraviolet Rays; D014970:Xanthines
chemical_list: D002273:Carcinogens; D003497:Cyclic N-Oxides; D009589:Nitrogen Oxides; D010087:Oxides; D014970:Xanthines; D006147:Guanine