In the title compound, C23H17N3O, there is a short intramolecular C—H...O contact present, and the conformation about the C=N bond is E. The phenyl and benzylidene rings make dihedral angles of 28.21 (15) and 37.65 (14)° with the mean plane of the quinoline moiety. In the crystal, molecules are linked by N—H...O and C—H...O hydrogen bonds, forming chains propagating along [001], with the O atom accepting three hydrogen bonds.
