The title compound, C(19)H(21)N(3)O(4), crystallizes with two independent mol-ecules in the asymmetric unit. In both mol-ecules, there is an intra-molecular O-H⋯N hydrogen bond, which correlates with the fact that each mol-ecule adopts an E configuration with respect to the C=N bond. In the crystal, there are C-H⋯O and C-H⋯π inter-actions present.