Using COC(=O)c1c(F)cc(OCC[C@@H]2C[C@@H]2C2CCN(CC(F)(F)F)CC2)cc1F to produce O=C(O)c1c(F)cc(OCC[C@@H]2C[C@@H]2C2CCN(CC(F)(F)F)CC2)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.