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The title compound, C10H12O5N2, crystallizes with two independent mol­ecules in the asymmetric unit. The mol­ecules in the crystal structure are arranged into one-dimensional substructural ribbon motifs stabilized by a combination of two O—H...O and three N—H...O inter­molecular hydrogen bonds, and also augmented by short C=O...C=O carbon­yl–carbonyl inter­actions. Two inter­molecular C—H...O short contacts between adjacent ribbons generate complex two-dimensional sheets on the ab plane. Adjacent sheets are linked via C—H...π(arene) inter­actions, resulting in a complex three-dimensional framework.
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