title: [Dibenzothiophenes and related compounds. I. Syntheses of 5-substituted dibenzothiophenium salts and 10-substituted 9,9-dimethylthioxanthenium salts].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D009861:Onium Compounds; D013876:Thiophenes; D014966:Xanthenes
chemical_list: D009861:Onium Compounds; D013876:Thiophenes; D014966:Xanthenes