Received 3 January 2013
aUniversity of Peshawar, Institute of Chemical Sciences, Peshawar, Pakistan,bUniversity of Sargodha, Department of Physics, Sargodha, Pakistan, and cH.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
Correspondence e-mail: email@example.com
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.
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 2012) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 2012) and PLATON.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB7022 ).
The authors acknowledge the provision of funds for the purchase of the diffractometer and encouragement by Dr Muhammad Akram Chaudhary, Vice Chancellor, University of Sargodha, Pakistan.
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