![[Open access]](http://journals.iucr.org/e/graphics/free.gif)
![[Contents scheme]](ff2096contents.gif)
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-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.
Copyright © International Union of Crystallography
IUCr Webmaster