Jaafar, Noor Saad, and Hasan Thamir Ghanim. “Synthesis and Characterization of Some Derivatives Five Hetrocyclic Ring”. Al-Qadisiyah Journal of Pure Science 19, no. 4 (August 2, 2017): 97-115. Accessed May 8, 2024. https://journalsc.qu.edu.iq/index.php/JOPS/article/view/289.