title: Heterocyclic systems having eight pi-electrons. Synthesis, properties, and significance.
mesh_terms: D001381:Azepines; D055598:Chemical Phenomena; D002621:Chemistry; D004583:Electrons; D004735:Energy Transfer; D006571:Heterocyclic Compounds / Q000138:chemical synthesis; D008956:Models, Chemical; D008968:Molecular Conformation; D010082:Oxepins; D011048:Polarography; D013846:Thiepins
chemical_list: D001381:Azepines; D006571:Heterocyclic Compounds; D010082:Oxepins; D013846:Thiepins