The title compound, C(16)H(16)N(2)O(5)S, is a potent new fungicide. There are two mol-ecules in the asymmetric unit which are linked by C-H⋯π inter-actions, forming a dimer. The two phenyl rings in each mol-ecules are almost coplanar, with C-N-C-C torsion angles of 177.6 (2) and -172.5 (2)°. There are inter-molecular and intra-molecular N-H⋯O hydrogen bonds in the crystal structure.