(Z)-4-[(3-Aminona­phthalen-2-yl­amino)(phen­yl)methyl­idene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one

The mol­ecule of the title compound, C₂₇H₂₂N₄O, assumes a non-planar conformation in which the pyrazolone ring forms dihedral angles of 12.73 (11), 65.17 (6) and 49.82 (6)°, respectively, with the two benzene rings and the naphthalene ring system. In the crystal, pairs of mol­ecules are linked by inter­molecular N—H...N hydrogen bonds, forming dimers. The secondary amino group is involved in an intra­molecular N—H...O hydrogen bond.