Using O=C1C(NS(=O)(=O)c2ccccc2)CCCN1c1ccccc1, BrCc1ccccc1 to produce O=C1C(N(Cc2ccccc2)S(=O)(=O)c2ccccc2)CCCN1c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.