In the title compound, C(15)H(13)N(3)O(4), the dihedral angle between the benzene rings is 3.1 (3)°. The mol-ecule displays an E conformation about the C=N bond. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds, generating chains that propagate along the b-axis direction. There is also a C-H⋯O inter-action present.