Using [Br-], Cc1ccc(S(=O)(=O)O[C@@H]2CO[C@H]3[C@@H]2OC[C@H]3OS(=O)(=O)c2ccc(C)cc2)cc1 to produce Cc1ccc(S(=O)(=O)O[C@@H]2CO[C@H]3[C@@H]2OC[C@@H]3Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.