title: Pteridine studies. XLV. Addition of sodium hydrogen sulphite and other nucleophilic agents to pteridin-4-one and related compounds.
mesh_terms: D001463:Barbiturates; D055598:Chemical Phenomena; D002621:Chemistry; D006863:Hydrogen-Ion Concentration; D011621:Pteridines / Q000138:chemical synthesis*; D013447:Sulfites
chemical_list: D001463:Barbiturates; D011621:Pteridines; D013447:Sulfites