Acta Cryst. (2013). E69, o380
[ doi:10.1107/S160053681300411X ]
Abstract: In the title compound, C7H6N4O2, rings are almost coplanar, the dihedral angle between them being 8.45 (13)°. An intramolecular N-HO hydrogen bond occurs. In the crystal, the molecules are linked by O-HN and N-HO hydrogen bonds into a three-dimensional network.
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