Experimental Crystal data

R factor = 0.050; wR factor = 0.146; data-to-parameter ratio = 15.5. There are two independent molecules in the asymmetric unit of the title compound, C16H16N2O3, in which the dihedral angles between the two aromatic rings are 13.0 (3) and 6.4 (3). Intramolecular O—H N and N—H O hydrogen bonds are observed in both molecules, forming S(6) rings in all cases. Related literatur