Using O=S(=O)(c1ccc(CO)c(O)c1)C(F)(F)F, COC(CBr)OC to produce O=S(=O)(c1ccc2c(c1)OC(CBr)OC2)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.