Using CCOC(=O)COc1ccc2c(-c3ccc(Cl)cc3)noc2c1Cl to produce O=C(O)COc1ccc2c(-c3ccc(Cl)cc3)noc2c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.