Using C=CCCCCCCCCOC(C)=O, O=C(Cl)c1ccc2ccccc2c1 to produce C=CCCCCCCCCOC(=O)CC(=O)c1ccc2ccccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.