The asymmetric unit of the title compound, C14H11NO5, contains two independent mol-ecules in which the dihedral angles between the benzene rings are 89.27 (16) and 77.14 (12)°. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, generating C(8) chains propagating in [010] for one mol-ecule and [001] C(8) chains for the other. The chains are connected by C-H⋯O hydrogen bonds and π-π inter-actions [shortest centroid-centroid distance = 3.5908 (12)°], generating a three-dimensional network.
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