Using C=CCc1cc(OC(=O)C(C)(C)C)c(C(C)(C)C)cc1O to produce CC1Cc2cc(OC(=O)C(C)(C)C)c(C(C)(C)C)cc2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.