Using COC(=O)c1c(C)n(S(=O)(=O)c2ccccc2)c2ncccc12, O=C1CCC(=O)N1Br to produce COC(=O)c1c(CBr)n(S(=O)(=O)c2ccccc2)c2ncccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.