Using COC(=O)c1cc(-c2cc(C=O)ccc2OC(F)(F)F)c2c(c1)C(C)(C)CO2 to produce CC1(C)COc2c(-c3cc(C=O)ccc3OC(F)(F)F)cc(C(=O)O)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.