title: [Studies on the syntheses of N-heterocyclic compounds. XI. Syntheses of 3-phenyl-pyridazino(4,5-c)-and 5-phenyl-pyridazino-(4,5-d)pyridazine derivatives].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D011621:Pteridines / Q000138:chemical synthesis*; D011724:Pyridazines / Q000138:chemical synthesis*
chemical_list: D011621:Pteridines; D011724:Pyridazines