فهرس المقالات Phosphorus pentoxide used on alumina حرية الوصول المقاله صفحة الملخص نص كامل 1 - 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 Tayebeh Sanaeishoar Negar Hormozinezhad