Using Cc1ccc(S(=O)(=O)OC2CCN(C(=O)OC(C)(C)C)CC2)cc1, O=Cc1c(O)ccc(Br)c1F to produce CC(C)(C)OC(=O)N1CCC(Oc2ccc(Br)c(F)c2C=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.