Using CCN(CC)S(F)(F)F, CC(C)(C)OC(=O)C(C)(C)N1COC(CO)=C(c2ccccc2)C1=O to produce CC(C)(C)OC(=O)C(C)(C)N1COC(CF)=C(c2ccccc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.