Using Brc1nccs1, Sc1ccc2c(ccc3nnc(-c4ccccc4)n32)c1 to produce c1ccc(-c2nnc3ccc4cc(Sc5nccs5)ccc4n23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.