Using CCOC(=O)CNc1nc(-c2ccccc2Cl)c2ccc(=O)n(-c3ccccc3Cl)c2n1 to produce O=C(O)CNc1nc(-c2ccccc2Cl)c2ccc(=O)n(-c3ccccc3Cl)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.