Using CC(=O)N1CCC(C(=O)N2CC[C@@H](N(C)C(=O)C(F)(F)F)[C@H](c3ccc(Cl)c(Cl)c3)C2)CC1 to produce CN[C@@H]1CCN(C(=O)C2CCN(C(C)=O)CC2)C[C@H]1c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.