Using CC(C)(C)OC(=O)N1CCC(OS(C)(=O)=O)CC1, Oc1cc(F)ccc1F to produce CC(C)(C)OC(=O)N1CCC(Oc2cc(F)ccc2F)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.