Using CCOC(=O)c1ccc2c(c1)nc(Cc1ccccc1)n2Cc1ccc(Cl)cc1Cl to produce O=C(O)c1ccc2c(c1)nc(Cc1ccccc1)n2Cc1ccc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.