5-nitro-N-(5-nitropyridin-2-yl)pyridin-2-amine

2-异硫代氰酰基吡啶

4-methyl-N-pyridin-2-ylbenzenesulfonamide

N-p-tolylsulfonyl-2,2'-dipyridylamine

1-p-toluenesulfonyl-2-p-toluenesulfonylimino-1,2-dihydropyridine