Using O=S(=O)(c1cc(CCCCBr)cc(S(=O)(=O)C(F)(F)F)c1O)C(F)(F)F to produce C=CCCc1cc(S(=O)(=O)C(F)(F)F)c(O)c(S(=O)(=O)C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.