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organic compounds
Molecules of the title compound, C12H10N4O4S, are linked through intermolecular hydrogen bonds to form a dimeric structure. The crystal structure of the dimer is stabilized by two intermolecular hydrogen bonds of the C—HO type. The CO intermolecular contact distance is 3.339 (3) Å and the C=N and N—N distances are 1.279 (2) and 1.371 (7) Å, respectively. One O atom of the 2-nitro group is disordered over two sites.