Using COc1cc(C(C)(C)C)cc(C(C)(C)C)c1-c1ccc(Cl)cc1 to produce CC(C)(C)c1cc(O)c(-c2ccc(Cl)cc2)c(C(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.