Acta Cryst. (2012). E68, o696 [ doi:10.1107/S1600536812005466 ]
Abstract: In the title compound, C14H10N4O5, the molecule exists in a trans conformation with respect to the methylidene unit. The dihedral angle between the benzene rings is 9.8 (2)°. In the crystal, molecules are linked through N-HO hydrogen bonds to form chains along the c axis.
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