In the mol-ecule of the title compound, C(14)H(12)N(2)O(4), the two benzene rings make a dihedral angle of 84.53 (8)°. O-H⋯O and N-H⋯O hydrogen bonds link adjacent mol-ecules into a layer structure.
* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.