Acta Cryst. (2008). E64, o1842 [ doi:10.1107/S1600536808027335 ]
Abstract: The title compound, C17H18N6O2·0.5CH3OH, exists in the double keto form and adopts a highly puckered geometry, stabilized by intramolecular N-HO and N-HN hydrogen bonds. Intermolecular N-HN hydrogen bonds and - stacking interactions [centroid-centroid separation = 3.654 (1) Å] assemble the molecules into chains running in the  direction. The methanol solvent molecule is disordered over two sites related by inversion and forms a bifurcated O-H(N,O) hydrogen bond.
Online 30 August 2008
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