Using Nc1cc(S(=O)(=O)O)cc2cc(S(=O)(=O)O)ccc12 to produce Nc1cc(S(=O)(=O)[O-])cc2cc(S(=O)(=O)[O-])ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.