Using CN(C[C@@H](CCN1CCC(N2CCCCC2=O)CC1)c1ccc(Cl)c(Cl)c1)C(=O)OC(C)(C)C to produce CNC[C@@H](CCN1CCC(N2CCCCC2=O)CC1)c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.