Using COC(=O)c1cc(S(C)(=O)=O)c(Nc2ccc(S(F)(F)(F)(F)F)cc2)cc1C to produce Cc1cc(Nc2ccc(S(F)(F)(F)(F)F)cc2)c(S(C)(=O)=O)cc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.