Using CCN(C(=O)OC(C)(C)C)c1cccc(Br)c1, O=S(=O)(Cl)Cl to produce CCN(C(=O)OC(C)(C)C)c1cccc(S(=O)(=O)Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.