Using CC1(C)CC(=O)CC(C)(C(=O)O)C1, CCC(C)(C)CCO to produce CC(C)(C)CCOC(=O)C1(C)CC(=O)CC(C)(C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.