Cyclo-hexa-nespiro-2′-[2′,3′,6′, 7′-tetra-hydro-1′H-cyclo-penta-[d]pyrimidin]-4′(5′H)-one

The title compound, C¹²H¹⁸N²O, was synthesized by the reaction of cyclo-hexa-none and 2-amino-cyclo-pent-1- enecarbonitrile. In the mol-ecule of the title compound, the six-carbon ring displays a chair conformation, the six-membered 1,3-diaza ring and the cyclo-pentene ring both assume envelope conformations. Supra-molecular aggregation is achieved by N - H⋯O hydrogen bonds.