Using CCOC(=O)Cl, O=C1NC(=O)C2(N1)C(=O)N(Cc1ccc(Cl)c(Cl)c1)c1ccccc12 to produce CCOC(=O)N1C(=O)NC(=O)C12C(=O)N(Cc1ccc(Cl)c(Cl)c1)c1ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.