4-Methyl-N′-(2-oxoindolin-3-yl­idene)benzene-1-sulfono­hydrazide

In the title compound, C(15)H(13)N(3)O(3)S, the C—S—N(H)—N linkage is non-planar, the torsion angle being −65.12 (13)° and the S atom showing a tetra­hedral environment. The compound has two almost planar fragments linked to the S atom: the isatin-derivative fragment [(C(8)H(5)NO)N—N(H)–] and the tolyl fragment [C(7)H(7)–] have maximum deviations from the mean plane through the non-H atoms of 0.0813 (13) and 0.0094 (16) Å, respectively, and make an inter­planar angle of 80.48 (3)°. In the crystal, mol­ecules are connected into inversion dimers via pairs of N—H⋯O hydrogen bonds. Additionally, the mol­ecular structure is stabilized by an intra­molecular N—H⋯O hydrogen bond.