Using CS(N)(=O)=O, COc1ccc2c(Cc3cccc(C(=O)O)n3)c(-c3ccsc3)[nH]c2c1 to produce COc1ccc2c(Cc3cccc(C(=O)NS(C)(=O)=O)n3)c(-c3ccsc3)[nH]c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.