Using COC(=O)C1(C(=O)OC(C)(C)C)CCc2cccc(OC)c2C1 to produce COc1cccc2c1CC(C(=O)O)(C(=O)OC(C)(C)C)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.