Using O=C([O-])[O-], Cc1cccc(-c2ccc(Cl)c(C(=O)O)c2)c1 to produce COC(=O)c1cc(-c2cccc(C)c2)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.