3-氨基-2-氯吡啶

5-methyl-N-(2-oxo-1H-pyridin-3-yl)-1,2-oxazole-3-carboxamide

1-methyl-3-nitropyridin-2-one

1-甲基-3,5-二硝基-2-吡啶酮

2-氨基-3-羟基吡啶