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,. ANJS 2018, 9 (2), 7-17.