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In the title compound, C12H8N4O2, the dihedral angle between the phenanthroline ring system and the nitro group is 23.75 (14)°. The molecule features intramolecular N—H...O and C—H...O hydrogen bonds. In the crystal, N—H...(N,N), C—H...N and C—H...O hydrogen bonds link the molecules into  chains.doi:10.1107/s2414314619010162 fatcat:gm23wlz4xrbajcihuaj3vik5ua