Using NO, COC(=O)c1ccc2c(c1)N(C)S(=O)(=O)CC2=O to produce COC(=O)c1ccc2c(c1)N(C)S(=O)(=O)CC2=NO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.