Using [O-][I+3]([O-])([O-])[O-], CSCCS(=O)(=O)NC(C)(C)C#N to produce CS(=O)CCS(=O)(=O)NC(C)(C)C#N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.