[Syntheses of nitrogen-containing heterocyclic compounds. XXII. Syntheses of pyridonaphthyridines by improved one-step process (author's transl)].
D009287:Naphthyridines / Q000138:chemical synthesis*; D011728:Pyridones / Q000138:chemical synthesis*
D009287:Naphthyridines; D011728:Pyridones