Acta Cryst. (2012). E68, o20 [ doi:10.1107/S1600536811051233 ]
Abstract: The molecule of the title compound, C14H11N3O4, assumes an E conformation about the C=N double bond. The benzene rings form a dihedral angle of 3.9 (2)°. The crystal structure is stabilized by N-HO, O-HN, O-HO and C-HO hydrogen bonds, forming layers parallel to (101). In addition, intralayer - stacking interactions [centroid-centroid distance = 3.635 (2) Å] are observed.
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