Using COC(=O)c1cc(C(=O)OC)cc(S(=O)(=O)Nc2c(F)cc(F)cc2F)c1 to produce O=C(O)c1cc(C(=O)O)cc(S(=O)(=O)Nc2c(F)cc(F)cc2F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.