N-亚硝基-N-甲基对甲苯磺酰胺对甲苯基磺甲基亚硝酰胺N-Methyl-N-nitroso-p-toluenesulfonamideN-Nitroso-p-toluenesulfomethylamide重氮甲烷前体N-甲基-N-亚硝基对甲苯磺酰胺p-TolylsulfomethylnitrosamideN-Nitroso-N-methyl-p-toluenesulfonamideDiazald®N-Methyl-N-(p-tolylsulfonyl)nitrosamideDiazomethane precursor