Using CCC(Cc1ccc(C(=O)OC(C)(C)C)s1)C(=O)OCc1ccccc1, C1CCOC1 to produce CCC(CC)(Cc1ccc(C(=O)OC(C)(C)C)s1)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.