Using Nc1cc(S(=O)(=O)n2c(=O)[nH]c3cc(Cl)ccc3c2=O)ccc1C(=O)O to produce Nc1cc(S(=O)(=O)n2c(=O)[nH]c3cc(Cl)ccc3c2=O)ccc1C(=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.