The structure of the title compound, C18H15N3O4S, displays the charact
eristic features of benzenesulfonamide derivatives, The N-phenyl rings
are twisted by 48.3 (1) and 77.8(1)degrees with respect to the benzen
e ring of the phenylsulfonamide group. In the crystal, the molecules a
re linked to form dimers via N-H ... O hydrogen bonds between sulfonam
ide groups. The amine H atom participates in an intramolecular hydroge
n bond with the neighbouring nitro substituent.