Using COC(=O)C1CCN(c2ncc(Cl)cc2NC(=O)c2cccc(Cl)c2)CC1 to produce O=C(Nc1cc(Cl)cnc1N1CCC(C(=O)O)CC1)c1cccc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.