title: A new, general synthesis of purines.
mesh_terms: D000478:Alkylation; D008722:Methods; D008745:Methylation; D009603:Nitroso Compounds; D014498:Uracil / Q000031:analogs & derivatives; D014970:Xanthines / Q000138:chemical synthesis*
chemical_list: D009603:Nitroso Compounds; D014970:Xanthines; D014498:Uracil