Using NCC(F)(F)F, COC(=O)[C@@H](Cc1cc(Cl)c2[nH]ncc2c1CCl)OC(=O)c1ccccc1 to produce COC(=O)[C@@H](Cc1cc(Cl)c2[nH]ncc2c1CNCC(F)(F)F)OC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.