Using O=C(O)CC(O)(CC(=O)O)C(=O)O, CON(C)C(=O)c1cc2cccc(NS(=O)(=O)c3cccs3)c2[nH]1 to produce CC(=O)c1cc2cccc(NS(=O)(=O)c3cccs3)c2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.