Using CCOC(=O)CCCCCCCCCc1ccccc1, O=C1OC(=O)c2ccccc21 to produce CCOC(=O)CCCCCCCCCc1ccc(C(=O)c2ccccc2C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.