NMR gives an AA'BB' XY pattern

diNOsar = [(1,8-Dinitro-3,6,10,13,16,19-hexa-azabicyclo{6.6.6}icosane)

Referrence: J.M. Horrowfield, G.A. Lawrance, A.M. Sargenson, Journal of Chemical Education Vol 62, 1985, p. 804-6

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