Using CCOCC, COc1cc(-c2ccccc2C)ccc1C(=O)N1Cc2ccc(C(=O)C(Cl)(Cl)Cl)n2Cc2ccccc21 to produce COc1cc(-c2ccccc2C)ccc1C(=O)N1Cc2ccc(C(=O)O)n2Cc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.