N -[7-Ethoxy-1-(prop-2-en-1-yl)-1 H -indazol-4-yl]-4-methylbenzenesulfonamide

In the title compound, C19H21N3O3S, the C—SO2—NH—C torsion angle is 103.72 (11)°. The almost planar indazole ring [r.m.s. deviation = 0.0202 (14) Å] is twisted away from the methylbenzene ring by 76.87 (7)°. The vinyl group is disordered over two orientations with site occupancies of 0.622 (10) and 0.378 (10). The S atom has a distorted tetrahedral geometry [maximum deviation: O—S—O = 119.18 (11)°]. An intramolecular C—H...O hydrogen bond occurs. In the crystal, two molecules are linked about a center of inversion by pairs of N—H...O hydrogen bonds, generating a dimer. C—H...π interactions are also observed.