Using CCOC(=O)c1sc(-c2ccc(Cl)cc2)c(C)c1-c1ccc(S(N)(=O)=O)cc1, O=C1CCC(=O)N1Br to produce CCOC(=O)c1sc(-c2ccc(Cl)cc2)c(CBr)c1-c1ccc(S(N)(=O)=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.