Using O=C(O)c1cccc(S)c1, Ic1ccc2c(-c3ccccc3)cc3nncn3c2c1 to produce O=C(O)c1cccc(Sc2ccc3c(-c4ccccc4)cc4nncn4c3c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.