The mol-ecule of the title compound, C(16)H(24)N(2)O(6), which lies on a crystallographic inversion centre in the centre of the benzene ring, adopts an anti conformation in terms of the relative orientation of two amide carbonyl groups. One pair of the 2-hydroxy-ethyl groups is partially disordered with site occupancy factors of 0.811 (2) and 0.189 (2). The dihedral angle between the amide group and central benzene ring is 67.0 (2)°. Two O-H⋯O and one bifurcated O-H⋯(O,O) hydrogen bonds are present, resulting in a three-dimensional network.