Using CCOC(=O)CC(=O)N(CCC(=O)OC)Cc1ccc(NC(=O)OCc2ccccc2)cc1 to produce CCOC(=O)C1C(=O)CCN(Cc2ccc(NC(=O)OCc3ccccc3)cc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.