Using O=S(=O)(Nc1ccccc1)C(F)(F)F, CCCCOc1nccc2nc(O)c3ccncc3c12 to produce CCCCOc1nccc2nc(OS(=O)(=O)C(F)(F)F)c3ccncc3c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.