Eco-friendly and Convenient Synthesis of Biologically Active Polysubstituted Dihydro-2-Oxypyrroles Using Manganese (II) Nitrate Tetrahydrate at Ambient Temperatures - Farzaneh Mohamadpour; Young Researchers and Elite Club, Shiraz Branch, Islamic Azad University, Shiraz 37195, Iran (Directorate of Research and Community Engagement, Universitas Indonesia, 2019)