Using CCCCI, COC(=O)C1CC(=O)Nc2cc(Cl)ccc2C1=O to produce CCCCN1C(=O)CC(C(=O)OC)C(=O)c2ccc(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.