N′-(2-Hydroxy-1,2-diphenylethylidene)benzohydrazide

In the title compound, C21H18N2O2, the amino group is involved in an intramolecular N—H...O hydrogen bond. The rings make dihedral angles of 37.9 (2), 64.4 (2) and 83.6 (2)°. In the crystal, intermolecular O—H...N and O—H...O hydrogen bonds link the molecules into chains running along [100].