title: [Tetrahydrodipyranophthalazines and tetrahydrodipyranobenzoxazines (author's transl)].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D006834:Hydrazines; D010078:Oxazines / Q000138:chemical synthesis*; D010793:Phthalazines; D011724:Pyridazines
chemical_list: D006834:Hydrazines; D010078:Oxazines; D010793:Phthalazines; D011724:Pyridazines
vernacular_title: Tetrahydrodipyrano-phthalazine und Tetrahydrodipyrano-benzoxazine