Using CC(=O)Oc1cccc2oc(C(=O)OCc3ccc(Cl)cc3)c(C)c12 to produce Cc1c(C(=O)OCc2ccc(Cl)cc2)oc2cccc(O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.