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Acta Cryst. (2007). E63, o2785 [ doi:10.1107/S1600536807019642 ]
Abstract: The title compound, C7H8N2O4, is an important precursor of bi- or multidentate ligands. The structure contains two molecules linked together via intermolecular N-H
O and N-H
N hydrogen bonds and intermolecular C-H
O contacts, resulting in a two-dimensional network. All atoms except for methyl H atoms lie on crystallographic mirror planes.
Online 3 May 2007
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