Using Br, CC(C)(c1cc(-c2cccc(CO)c2)c2ncccc2c1)S(C)(=O)=O to produce CC(C)(c1cc(-c2cccc(CBr)c2)c2ncccc2c1)S(C)(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.