Using COc1cccc(CC2CCCCC2C(=O)O)c1, O=C(c1ccccc1)C(O)c1ccccc1 to produce COc1cccc(CC2CCCCC2C(=O)OC(C(=O)c2ccccc2)c2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.