Using O=S(=O)(c1ccccc1)n1c(C(O)c2ccccc2)cc2ccncc21 to produce O=C(c1ccccc1)c1cc2ccncc2n1S(=O)(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.