3-Methyl-1,5-dinitro-9-phenacyl-3-azabicyclo[3.3.1]non-7-en-6-one

There are two molecules, A and B, in the asymmetric unit of the title compound, C34H34N6O12. In both molecules, the eight-membered ring has a conformation which is close to a boat-boat conformation and the cyclohexene ring is characterized by a sofa conformation. The nitro groups in each molecule are situated in equatorial positions. Both nitro groups of molecule A are considerably rotated with respect to the flattened fragment of the cyclohexene ring. The same is true for one of the nitro groups of molecule B, whereas the other such group in molecule B is almost coplanar with the corresponding fragment.