The title compound, C(13)H(16)N(2)O(3), adopts an E configuration with respect to the C=N bond and an intra-molecular N-H⋯N hydrogen bond results in the formation of a six-membered ring. In the crystal, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into a chain propagating along the b axis. Very weak π-π stacking inter-actions [centroid-centroid distance = 4.18 (2) Å] may further consolidate the packing, forming a two-dimensional supra-molecular network.