Acta Cryst. (2013). E69, o207 [ doi:10.1107/S160053681300024X ]
Abstract: In the title compound, C15H12N2O7, the dihedral angle between the aromatic rings is 4.58 (13)° and the nitro group is rotated from its attached ring by 18.07 (17)°. Intramolecular N-HO and O-HO hydrogen bonds generate S(5) and S(6) rings, respectively. In the crystal, molecules are linked by O-HO hydrogen bonds, generating  C(7) chains. The chains are linked by C-HO interactions, forming a three-dimensional network, which incorporates R22(7) and R22(10) loops.
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