Using Cc1cc(SC(C)C)c(NC(=O)CBr)c(SC(C)C)n1, Sc1nc2ccccc2o1 to produce Cc1cc(SC(C)C)c(NC(=O)CSc2nc3ccccc3o2)c(SC(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.