Using CCCS(=O)(=O)c1ccc(NS(=O)(=O)c2cccs2)c2[nH]c(C(=O)OCC)cc12 to produce CCCS(=O)(=O)c1ccc(NS(=O)(=O)c2cccs2)c2[nH]c(C(=O)O)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.