Using OB(O)c1cccc(Cl)c1Cl, NS(=O)(=O)c1ccccc1NS(=O)(=O)c1cccc(Br)c1 to produce NS(=O)(=O)c1ccccc1NS(=O)(=O)c1cccc(-c2cccc(Cl)c2Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.