4-Dimethylamino-N′-(2-hydroxy-3,5-diiodobenzylidene)benzohydrazide

The title molecule, C16H15I2N3O2, adopts an E configuration about the C=N bond. The dihedral angle between the two benzene rings is 6.4 (2)°. An intramolecular O—H...N hydrogen bond occurs. In the crystal, molecules are linked through intermolecular N—H...O hydrogen bonds, forming chains propagating in the c-axis direction.