All the non-H atoms of the title Dioramas compound, C10H10N4O3, are almost coplanar, the maximum deviation from planarity being 0.065 (3) Å.The dihedral angle between the aromatic rings is 1.66 (6)°.
The molecule adopts the enol–imine tautomeric form with an intramolecular hydrogen-bonding interaction between the Schiff base Womens Sandals N atom and the hydroxy group.In the crystal, intermolecular N—H.O and O—H.O hydrogen bonds link the molecules into a three-dimensional network.