Using COC(=O)[C@H](C)NS(=O)(=O)c1ccc(OC)cc1, BrCc1ccccc1 to produce COC(=O)C(C)N(Cc1ccccc1)S(=O)(=O)c1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.