Using CN, CC(C)c1c(C=O)cn(S(=O)(=O)c2ccccc2)c1Br to produce CNCc1cn(S(=O)(=O)c2ccccc2)c(Br)c1C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.