Using O=C(Cl)OCC(Cl)(Cl)Cl, Cc1cc(C)c2c(c1)[C@@H]1CN(C)CC[C@@H]1CC2=O to produce Cc1cc(C)c2c(c1)C1CN(C(=O)OCC(Cl)(Cl)Cl)CCC1CC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.