Using O=C(Cl)c1ccccc1, CCOC(=O)c1oc2cccc(OC)c2c1C to produce CCOC(=O)c1oc2c(C(=O)c3ccccc3)ccc(OC)c2c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.