In the title compound, C(35)H(26)Cl(3)N(3)O(5)S(3), the dihedral angle between the mean plane through the thieno[2,3-b]pyridine ring system and the attached benzene ring is 3.89 (6)°. The mol-ecular conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond. In the crystal, mol-ecules are linked by inter-molecular C-H⋯O hydrogen bonds, forming chains parallel to [100].