Using Cc1cc(C=O)on1, Clc1nc2ccc(Br)cc2c(Cl)c1-c1ccccc1 to produce Cc1cc(C(O)c2ccc3nc(Cl)c(-c4ccccc4)c(Cl)c3c2)on1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.