Using CCOC(=O)CNC(=O)c1ccc(-c2ccc(Cl)cc2)cc1OC to produce O=C(O)CNC(=O)c1ccc(-c2ccc(Cl)cc2)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.