Using CCC(=O)CC(=O)CC, Nc1ccc(Br)cc1C(=O)c1ccccc1 to produce CCC(=O)c1c(CC)nc2ccc(Br)cc2c1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.