Using C=CCNS(=O)(=O)c1cc(-c2sc(NC(C)=O)nc2C)c(Br)s1 to produce C=CCNS(=O)(=O)c1cc(-c2sc(NC(C)=O)nc2C)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.