title: [Tetrahydrobenzodipyrandiones and tetrahydrobenzodipyrans (author's transl)].
mesh_terms: D001578:Benzopyrans / Q000138:chemical synthesis*; D002384:Catalysis; D055598:Chemical Phenomena; D002621:Chemistry; D008722:Methods
chemical_list: D001578:Benzopyrans
vernacular_title: Tetrahydrobenzodipyrandione und Tetrahydrobenzodipyrane