(E)-4-Hy-droxy-N'-(4-hy-droxy-3-meth-oxy-benzyl-idene)benzohydrazide.

In the title compound, C(15)H(14)N(2)O(4), the N=C double bond has an E configuration. The two benzene rings make a dihedral angle of 28.59†(6)°. In the crystal, mol-ecules are linked into a three-dimensional network by inter-molecular N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds and stabilized by weak C-H⋯π inter-actions.