Using COc1ccc(Cn2cc(Cl)c3ccc(Br)cc3c2=O)cc1, SCc1ccccc1 to produce COc1ccc(Cn2cc(Cl)c3ccc(SCc4ccccc4)cc3c2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.