Using O=Cc1cc(Br)ccc1Cl, COc1ccc(CN2CCCc3cc(Br)ccc32)cc1 to produce COc1ccc(CN2CCCc3cc(C(O)c4cc(Br)ccc4Cl)ccc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.