The asymmetric unit of the title compound, C(26)H(26)O(6), contains only a half-mol-ecule, the other half being generated by an inversion center. The two carboxy-phenoxy-methyl units occupy the 1,4-positions of the central aromatic ring. The central ring and the six linked C atoms are almost planar, with a maximum deviation of 0.0286 (17) Å, and the plane makes a dihedral angle of 75.50 (6)° with the benzene ring. In the crystal, strong O-H⋯O hydrogen bonds between the carboxyl groups of adjacent mol-ecules and C-H⋯π inter-actions link the mol-ecules into zigzag chains along (220) and (10); the two types of chain are arranged alternately, forming a three-dimensional framework.
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