Using COC(c1ccccc1)N1C(=O)O[C@H]2C[C@@H]3COC(c4ccccc4)O[C@H]3[C@H](O)[C@H]21, COCCN(CCOC)S(F)(F)F to produce COC(c1ccccc1)N1C(=O)O[C@H]2C[C@@H]3COC(c4ccccc4)O[C@H]3[C@@H](F)[C@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.