1,3-Diphenylpropan-2-one (2,4-dinitrophenyl)hydrazone

In the title compound, C21H18N4O4, there is an intramolecular N—H...O hydrogen bond between the amino H atom and an O atom of the 2-nitro group of the adjacent benzene ring. The central benzene ring forms dihedral angles of 79.98 (7) and 82.88 (7)° with the two phenyl rings. In the crystal structure, molecules are linked into a three-dimensional network by weak C—H...N, C—H...O and C—H...π interactions.