The mol­ecule of the title compound, C₂₅H₃₄N₂O₆, adopts a fully extended configuration. The oxime (—CH=N—O—) group is coplanar with the aromatic ring and the two benzene rings are almost parallel, making a dihedral angle of 0.16 (3)°. In the crystal structure, strong intra­molecular O—HN hydrogen bonds generate six-membered S(6) ring motifs. Inter­molecular C—HO hydrogen bonds link each mol­ecule to five others, forming an infinite three-dimensional supra­molecular structure. The crystal is further stabilized by π–π stacking inter­actions between neighbouring benzene rings [centroid–centroid distance = 3.744 (2) Å].