Using O=S(=O)(c1ccccc1)n1cc(-c2cnn(-c3ccc(Cl)nn3)c2)c2ccc(F)cc21 to produce Fc1ccc2c(-c3cnn(-c4ccc(Cl)nn4)c3)c[nH]c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.