Using CC(C)Oc1cc(-c2ccc(F)cc2F)c(C2CC2)cc1CO to produce CC(C)Oc1cc(-c2ccc(F)cc2F)c(C2CC2)cc1C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.