Experimental

R factor = 0.044; wR factor = 0.116; data-to-parameter ratio = 14.5. In the title compound C24H17BrN2O5S, the phenyl ring makes dihedral angles of 85.4 (2) and 8.8 (2) with the indole ring system and the nitrobenzene ring, respectively, while the indole ring system and nitrobenzene ring make a dihedral angle of 80.1 (2). In the crystal, weak C—H O interactions link the molecules, forming a two-dimensional network parallel to the bc plane. Related literature For the biological activity of indole derivatives, see: Andreani et al. (2001); Singh et al. (2000); Pomarnacka & Kozlarska-Kedra (2003); Srivastava & Pandeya (2011). For a related structure, see: Umadevi et al. (2013); Kanchanadevi et al