Using CCCCCCO, O=S(=O)(C(c1c(F)c(F)c(F)c(F)c1F)S(=O)(=O)C(F)(F)F)C(F)(F)F to produce CCCCCCOc1c(F)c(F)c(C(S(=O)(=O)C(F)(F)F)S(=O)(=O)C(F)(F)F)c(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.