Using OCC(F)(F)C(F)(F)F, N[C@@H](CSC(c1ccccc1)(c1ccccc1)c1ccccc1)C(=O)O to produce O=C(O)[C@H](CSC(c1ccccc1)(c1ccccc1)c1ccccc1)NCC(F)(F)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.