Using [Br-], COC(=O)c1c(Cc2ccc(C(C)=O)cc2)c(=O)c2ccc(C)nc2n1-c1ccccc1 to produce COC(=O)c1c(Cc2ccc(C(=O)CBr)cc2)c(=O)c2ccc(C)nc2n1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.