Using Sc1nc2ccccc2o1, CCSc1cc(C)nc(SCC)c1NC(=O)CCCCCBr to produce CCSc1cc(C)nc(SCC)c1NC(=O)CCCCCSc1nc2ccccc2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.