Using O=C1CCCN1, COc1ccc(C(=O)Oc2c(Cl)c(Cl)c(Cl)c(Cl)c2Cl)cc1 to produce COc1ccc(C(=O)N2CCCC2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.