Using CC(C)(C[Sn](Cl)(CC(C)(C)c1ccccc1)c1ccc(F)cc1)c1ccccc1, [F-] to produce CC(C)(C[Sn](F)(CC(C)(C)c1ccccc1)c1ccc(F)cc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.