4-methylsulfanyl-2-oxo-6-pyridin-3-ylpyran-3-carbonitrile

3-(2-溴乙酰基)吡啶

methyl 4-hydroxy-2-oxo-4-pyridin-3-ylbut-3-enoate

3-(dimethylamino)-1-pyridin-3-ylpropan-1-one,hydrochloride

2-pyridin-3-ylquinoline