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The title mol­ecule, C9H8ClN3O3, lies on a mirror plane. Intra­molecular N—H...O and N—H...Cl hydrogen bonds occur. One of the nitro O atoms is disordered (site occupancy ratio = 0.40:0.10).

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The title compound, C30H36N2O2, was prepared in a twofold Cadogan cyclization. The mol­ecule is located about a center of inversion. The indolocarbazole skeleton is essentially planar [maximum deviation = 0.028 (2) Å], the C-N bond lengths are nearly identical and the C-C bond lengths of the pyrrole unit are significantly longer than those of the benzene subunits.
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