Using CCOC(=O)C(C)(C)CCCCC(=O)CCCCC1(C(=O)OCC)CCC1 to produce CC(C)(CCCCC(=O)CCCCC1(C(=O)O)CCC1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.