ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, vol.61, 2005 (SCI-Expanded)
The title compound, C14H12N2O4, exists as an enol-imine tautomer, in which a strong intramolecular O - H....... N hydrogen bond is formed. This study verifies the preference of the enol-imine tautomeric form in the solid state.