title: Carcinogenic nitrogen compounds. LXX. Polycyclic naphthyridines by means of the Ullmann-Fetvadjian reaction.
mesh_terms: D001578:Benzopyrans; D002273:Carcinogens; D055598:Chemical Phenomena; D002621:Chemistry; D004988:Ethers, Cyclic; D009281:Naphthalenes; D009287:Naphthyridines; D011083:Polycyclic Compounds; D011725:Pyridines; D011804:Quinolines
chemical_list: D001578:Benzopyrans; D002273:Carcinogens; D004988:Ethers, Cyclic; D009281:Naphthalenes; D009287:Naphthyridines; D011083:Polycyclic Compounds; D011725:Pyridines; D011804:Quinolines