The title compound, C15H12N4O2, contains two independent molecules in the
asymmetric unit. These differ in terms of dihedral angles that the phenyl and
2-pyridyl rings subtend with the central five-membered ring; 15.2 (2) and
2.9 (2), respectively, in one molecule, 8.9 (2) and 5.1 (2)for the second. In the
crystal, the independent molecules each self-associate to form layers through
N—H O and C—H O hydrogen bonding. The layers associate through –
interactions between the phenyl rings and isolated carbon–carbon double bonds
[shortest midpoint–centroid distance = 3.347 (4) A ° ]. The crystal studied was
refined as a two-component twin.