Using [Li]C, COc1ccc(COc2ccc(-c3cc(OC)ccc3F)c(C(=O)C(C)(C)C)c2)cc1 to produce COc1ccc(COc2ccc(-c3cc(OC)ccc3F)c(C(C)(O)C(C)(C)C)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.