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In the title compound, C15H13NO4, the dihedral angle between the substituted benzene rings is 9.9 (8)°. Part of the mol­ecule (the salicylaldimine segment) is disordered over two sets of sites, with a refined site-occupancy ratio of 0.550 (14):0.450 (14). Intra­molecular O—H...N hydrogen bonds form S(6) ring motifs. In the crystal, pairs of O—H...O hydrogen bonds link mol­ecules into centrosymmetric dimers with R22(8) ring motifs. The crystal packing also features C—H...π inter­actions.
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