Using COC(=O)C(=O)c1ccc(O)cc1, O=C(CCl)c1cccc2ccccc12 to produce COC(=O)C(=O)c1ccc(OCC(=O)c2cccc3ccccc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.