Using CC(C)(C)OC(=O)N[C@H]1CC(O)(CO)CO[C@@H]1c1cc(F)c(F)cc1F to produce CC(C)(C)OC(=O)N[C@H]1CC(=O)CO[C@@H]1c1cc(F)c(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.