ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, cilt.64, 2008 (SCI-Expanded)
In the title compound, C10H11N3O, the planar five- and six-membered rings are nearly parallel to each other, making a dihedral angle of 2.52 (5)degrees. Weak intermolecular C-H center dot center dot center dot O hydrogen bonds link the molecules into centrosymmetric dimers and strong intermolecular O-H center dot center dot center dot N hydrogen bonds link the dimers into infinite chains along the b axis.