Using O=C(c1cc(S(=O)(=O)Cl)c[nH]1)c1cccnc1Cl, Clc1ccc(CBr)cc1 to produce O=C(c1cc(S(=O)(=O)Cc2ccc(Cl)cc2)c[nH]1)c1cccnc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.