Acta Cryst. (2008). E64, o1988 [ doi:10.1107/S1600536808030031 ]
Abstract: In the title compound, C18H16N4O4, the dihedral angles between the central pyrazole ring and the pendant substituted and unsubstituted aromatic rings are 4.73 (12) and 44.24 (14)°, respectively. An intramolecular O-HO hydrogen bond occurs. In the crystal structure, an intermolecular C-HO interaction may help to consolidate the packing and a short intramolecular C-HO contact also occurs.
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