Synthesis and Characterization of Oxazepine and Oxazepane from reaction of 2-(2- Amino - ethylimino)-5,5- diethyl-pyrimidine-4,6- dione and 2-[2-(5,5- diethyl -4,6 - dioxo - pyrimidine -2- ylideneamino) - ethylimino] -5,5- diethyl-dihydro- pyrimidine - 4,. (2018). Al-Nahrain Journal of Science, 9(2), 7-17. https://anjs.edu.iq/index.php/anjs/article/view/1651