Using COc1ccc(Cn2cc(-c3csc(Nc4ccccn4)n3)cn2)cc1, O=C1CCC(=O)N1Br to produce COc1ccc(Cn2cc(-c3nc(Nc4ccccn4)sc3Br)cn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.