Using CC(=O)Oc1cc(C(C)(C)C)c(OC(C)=O)c(C(C)(C)C)c1 to produce CC(=O)Oc1c(C(C)(C)C)cc(O)cc1C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.