Using COc1cc(Cl)c(CBr)c(Cl)c1, O=C1CCCN1C1CCC2(CC1)OCCO2 to produce COc1cc(Cl)c(CC2CCN(C3CCC4(CC3)OCCO4)C2=O)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.