Using CC(C)(C)OC(=O)C(=CC1C(C(=O)[O-])C1(C)C)OC(C)(C)C to produce CC(C)(C)OC(=O)C(=CC1C(C(=O)O)C1(C)C)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.