Using COC(=O)c1ccc(C2(C(=O)OC(C)(C)C)CCCCC2)cc1 to produce CC(C)(C)OC(=O)C1(c2ccc(C(=O)O)cc2)CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.