Using C[C@H](c1ccccc1)N1C[C@@]2(F)CCC[C@@]2(NC(=O)OC(C)(C)C)C1 to produce CC(C)(C)OC(=O)N[C@@]12CCC[C@]1(F)CNC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.