Using COc1c(-c2ccc(C(F)(F)F)cc2)oc2cc(O)cc(O)c2c1=O to produce O=c1c(O)c(-c2ccc(C(F)(F)F)cc2)oc2cc(O)cc(O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.