Acta Cryst. (2013). E69, o187 [ doi:10.1107/S1600536812050854 ]
Abstract: The molecule of the title compound, C9H9N5O, is essentially planar (r.m.s. deviation of all atoms = 0.02 Å) except for the NH2 H atoms. An intramolecular hydrazinylidene-carbonyl N-HO=C hydrogen bond is present. In the crystal, molecules are connected via N-HN/O hydrogen bonds, forming thick layers parallel to (100).
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