Using CCOC(=O)C(O)c1c(C)cc2ccc(Br)cc2c1OS(=O)(=O)C(F)(F)F to produce CCOC(=O)C(=O)c1c(C)cc2ccc(Br)cc2c1OS(=O)(=O)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.