Using CCOC(=O)c1noc2c1CN(C(=O)Nc1ccc(Cl)c(Cl)c1)CC2 to produce O=C(O)c1noc2c1CN(C(=O)Nc1ccc(Cl)c(Cl)c1)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.