“…The same series of compounds with n-propyl and iso-propyl derivatives have been studied by Allingham et al (1968) using the 1H-NMR. Some related structures viz, (Chaudhuri et al, 2001), 2-amino-4,6-diphenyl-4H-1,3-oxazinium trifluoroacetate (Huang & Sun, 2005) and spirocyclohexane oxazines, thiazines and selenazines (Baert et al, 1989)…”