Using COc1ccc(CCl)cc1, O=c1[nH]cc(Cl)c2ccc(Br)cc12 to produce COc1ccc(Cn2cc(Cl)c3ccc(Br)cc3c2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.