Using COC(=O)C1CC(C)(C)Oc2nc(-c3ccccc3Cl)c(-c3ccc(Cl)cc3)cc21 to produce CC1(C)CC(C(=O)O)c2cc(-c3ccc(Cl)cc3)c(-c3ccccc3Cl)nc2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.