( E)-2-Hydroxy- N′-(3-hydroxy-4-methoxybenzylidene)benzohydrazide.

The molecule of the title compound, C15H14N2O4, is roughly planar, except for the methyl H atoms, and displays a trans configuration with respect to the C=N double bond. The dihedral angle between the two rings is 3.7 (2)°. The crystal structure is stabilized by intermolecular O—H...O and N—H...O hydrogen bonds. [ABSTRACT FROM AUTHOR]