Abstract
The title compound, C10H12N2O4, adopts the keto-amine tautomeric form and displays two intramolecular N-H…O hydrogen bonds. The keto-amine structure is favored by through-molecule conjugation between the hydroxyl O atom and the imine N atom. The title compound crystallizes in the monoclinic space group P21/c with the following unit-cell parameters: a = 10.953(2)Å, b = 5.5272(6)Å, c = 18.754(4)Å, β = 108.306(16)° and V = 1077.9(3)Å3. The crystal structure of this compound contains two molecules in an asymmetric unit, and each molecule exists as part of an O-H…O hydrogen-bonded centrosymmetric dimer.
