Using CCOC(=O)C1C(=O)C(C(=O)CC)C(=O)CC1c1ccccc1O to produce CCC(=O)C1C(=O)CC2c3ccccc3OC(=O)C2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.