Using CC(=O)OC1NC(=O)C2=C1CN=C(c1ccccc1Cl)c1cc(Cl)ccc12 to produce COC1NC(=O)C2=C1CN=C(c1ccccc1Cl)c1cc(Cl)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.