Using O=C(Oc1ccccc1)c1cc(O)c2ccccc2c1-c1ccc(F)cc1 to produce O=C(O)c1cc(O)c2ccccc2c1-c1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.