Mir, Fatemeh, Hazeri, Nourallah, Maghsoodlou, Malek Taher, Lashkari, Mojtaba (2023). Synthesis of Pyrazolopyranopyrimidine and Dihydropyrano[2,3-c]pyrazole Derivatives using Vitamin D as an Efficient Catalyst under Green Condition. *Journal of Applied Chemical Research*, 17(1), 72-86.