3-hydroxy-4-(piperidin-1-ylmethyl)-1H-pyridin-2-one

3-hydroxy-1-(4-methylphenyl)sulfonylpyridin-2-one

2,3-二氢-1,4-二噁英并[2,3-B]嘧啶

3-甲氧基-2(1H)-吡啶酮

1-甲基-3-羟基-2(1H)-吡啶酮