Using O=C(O)C(=O)O, Nc1cc(S(N)(=O)=O)c2ccccc2c1N to produce NS(=O)(=O)c1cc2nc(O)c(O)nc2c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.