Using CCN1C(=O)Cc2cc3c(cc21)CCO3, O=C=Nc1ccc(Cl)cc1 to produce CCN1C(=O)C(C(=O)Nc2ccc(Cl)cc2)c2cc3c(cc21)CCO3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.