Using CS(=O)(=O)N(CCO)c1ccc2c(c1)C(=O)N(CC(=O)OCc1ccccc1)C2=O, BrC(Br)(Br)Br to produce CS(=O)(=O)N(CCBr)c1ccc2c(c1)C(=O)N(CC(=O)OCc1ccccc1)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.