Using COc1ccc(CCN(CCCC(=O)O)C(=O)c2ccc(Cl)cc2)cc1OC, COC(=O)CCCN to produce COc1ccc(CCN(CCCC(=O)NCCCC(=O)O)C(=O)c2ccc(Cl)cc2)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.