Using COC(=O)c1cnc(CO)cn1, O=S(=O)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F to produce COC(=O)c1cnc(CF)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.