Using COC(=O)C(C)(C)C(CC(C)C)c1ccc2c(cnn2-c2ccc(F)cc2)c1 to produce CC(C)CC(c1ccc2c(cnn2-c2ccc(F)cc2)c1)C(C)(C)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.