Using O=Cc1ccc(Cl)cc1, CC(=O)C(CCC(=O)O)(Cc1ccccc1Cl)c1ccccc1 to produce O=C(O)CCC(Cc1ccccc1Cl)(C(=O)C=Cc1ccc(Cl)cc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.