Using Cc1ccc(S(=O)(=O)n2c(CCO)cc3ccccc32)cc1, BrBr to produce Cc1ccc(S(=O)(=O)n2c(CBr)cc3ccccc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.