organic compounds
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In the title compound, C15H15N3O2S, the fused ring system is close to planar, the largest deviation from the mean plane being 0.030 (2) Å, and makes a dihedral angle of 48.84 (9)° with the benzene ring belonging to the methylbenzenesulfonamide moiety. In the crystal, molecules are connected through N—HN hydrogen bonds and weak C—HO contacts, forming a two-dimensional network parallel to (001).