Using O=c1[nH]c2ccc(S(=O)(=O)Cl)cc2[nH]c1=O, NCCBr to produce O=c1[nH]c2ccc(S(=O)(=O)NCCBr)cc2[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.