Using O=S(=O)(OCC(F)(F)F)C(F)(F)F, CC(C)(C)OC(=O)N1CCc2c(O)cccc2C1 to produce CC(C)(C)OC(=O)N1CCc2c(cccc2OCC(F)(F)F)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.