Using Cc1c(C(=O)[O-])sc2nc(Cc3ccc(Cl)c(Cl)c3)[nH]c(=O)c12 to produce Cc1c(C(=O)O)sc2nc(Cc3ccc(Cl)c(Cl)c3)[nH]c(=O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.