Using CCCc1cc(Cl)c(OC(C(=O)O)c2ccccc2)c(C(C)=O)c1O, CC(=O)[O-] to produce CCCc1cc(Cl)c2oc(-c3ccccc3)c(C)c2c1OC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.