Using COC(=O)Cc1cc2ccc(F)cc2c(-c2ccc(S(=O)(=O)c3ccc(F)cc3F)cc2)c1C to produce Cc1c(CC(=O)O)cc2ccc(F)cc2c1-c1ccc(S(=O)(=O)c2ccc(F)cc2F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.