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[Contents scheme]

Acta Cryst. (2013). E69, o380
[ doi:10.1107/S160053681300411X ]


Y. Kim

Abstract: In the title compound, C7H6N4O2, rings are almost coplanar, the dihedral angle between them being 8.45 (13)°. An intramolecular N-H...O hydrogen bond occurs. In the crystal, the molecules are linked by O-H...N and N-H...O hydrogen bonds into a three-dimensional network.

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