Ghafel, R. A. “Synthesisr Heteo Cyclic Compounds (four, Five and Seven) by Anil Compound and Study the Biological Activity”. Al-Qadisiyah Journal of Pure Science, Vol. 19, no. 2, July 2017, pp. 67-83, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/201.