Abstract: | The title compound, C7H8N2O4S, exhibits a markedly polarized molecular–electronic structure. The molecules are linked into a chain of edge‐fused (12) rings by two N—H?Ozdbnd;S hydrogen bonds H?O = 2.10 and 2.21 Å, N?O = 2.900 (2) and 2.878 (2) Å, and N—H?O = 152 and 133°]. |