Using Cc1c(Cl)cccc1S(=O)(=O)Nc1nc(CCO)cs1, BrC(Br)(Br)Br to produce Cc1c(Cl)cccc1S(=O)(=O)Nc1nc(CCBr)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.