Using COc1cccc2c1OCC2=O, O=S(=O)(OS(=O)(=O)C(F)(F)F)C(F)(F)F to produce COc1cccc2c(OS(=O)(=O)C(F)(F)F)coc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.