Using CI, Cn1c(=O)oc2cc(C(=O)Cc3ccc(Br)cc3Cl)ccc21 to produce CC(C(=O)c1ccc2c(c1)oc(=O)n2C)c1ccc(Br)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.