Acta Cryst. (2013). E69, o201 [ doi:10.1107/S1600536812051963 ]
Abstract: The asymmetric unit of the title compound, C16H16N2O4, contains one half-molecule, the whole molecule being generated by an inversion center located at the mid-point of the C-C bond of the central ethane group. An intramolecular O-HO hydrogen bond forms an S(6) ring motif. In the crystal, molecules are connected via N-HO hydrogen bonds, generating infinite chains along [1-10].
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