Diethyl 5,10-dihydro-9-meth­oxy-6-nitro-4,11-dioxo-cis-1H,3H,4H,11H-2-oxa-3a,4a,10a,11a-tetra­azabenz[f]indeno[2,1,7-ija]azulene-11b,11c-dicarboxyl­ate

The title compound, C20H21IN4O7, is a glycoluril derivative which contains five fused rings. An iodo­benzene ring is fused to a seven-membered ring linked to two of the N atoms from the separate rings of the glycoluril system, and the other two N atoms are linked to an O atom by two of the methyl­ene groups. The structure of the compound possesses normal geometrical parameters. The crystal packing is consolidated by inter­molecular hydrogen bonds, resulting in a two-dimensional network.