Maghsoodlou, M. T.; Masoumnia, A.; Mousavi, M. R.; Hazeri, N.; Aboonajmi, J.; Habibi-Khorasani, S. M.; Kiaee, S. A Green Protocol for Synthesis of Pyran Annulated Hetrocyclic Systems Using Na2SO4 As an Efficient Catalyst. Iran. J. Catal. 2024, 5 (2).