Sanaeishoar, Tayebeh, Hormozinezhad, Negar. Synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions via Phosphorus pentoxide supported on alumina (P2O5/Al2O3) catalyzed tandem reaction of Aldehyde with dimedone. Journal of Chemical Reactivity and Synthesis. 2018;8(2):13-17. doi: