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The title compound, C 28 H 28 N 2 O 4 , was synthesized by the reaction of 2-acetyl-1-naphthol with 1,4-bis­(amino­oxy)butane in ethanol. The molecule, which lies about an inversion centre, adopts a linear structure, in which the oxime groups and naphthalene ring systems assume an  anti  conformation. The intra­molecular inter­planar distance between parallel naphthalene rings is 1.054 (3) Å. Intra­molecular O—H⋯N hydrogen bonds are formed between the oxime nitro­gen and hydr­oxy groups.

2,2′-{1,1′-[Butane-1,4-diylbis(oxynitrilo)]diethylidyne}di-1-naphthol