Acta Cryst. (2005). E61, o3164-o3165  [ doi:10.1107/S1600536805027741 ]

rel-(11bR,11cS)-Diethyl 5,10-dihydro-7-nitro-4,11-dioxo-1H,3H,4H,11H-2-oxa- 3a,4a,10a,11a-tetraazabenz[f]indeno[2,1,7-ija]azulene-11b,11c-dicarboxylate

S. Qin and G. Yin

Abstract: In the title compound, C₂₀H₂₁N₅O₉, the dihedral angle between the two five-membered rings of the glycoluril system is 68.79 (14)° and the crystal structure is stabilized by intermolecular C-HO interactions.

Online 7 September 2005

Copyright © International Union of Crystallography
IUCr Webmaster