Using O=Cc1ccc(F)cc1, COc1ccc2c(O)c(-c3ccccc3)c(CCC(F)(F)F)cc2c1 to produce COc1ccc2c(Oc3ccc(C=O)cc3)c(-c3ccccc3)c(CCC(F)(F)F)cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.