In the title compound, C12H15N3O5S, an intramolecular N—H⋯O hydrogen bond between the hydrazine unit and one of the carbonyl groups may influence the molecular conformation. In the crystal structure, intermolecular N—H⋯O hydrogen bonds, including one which is bifurcated, link the molecules into a two-dimensional network.
In the title compound, C15H15N5O4S, the dihedral angle between the pyrimidine and benzene rings is 84.56 (2)°. Intramolecular hydrazine–carbonyl N—H⋯O and intermolecular sulfonamide–pyridimine N—H⋯N hydrogen bonds stabilize the molecular and crystal structures, respectively.
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