2,2-dimethyl-4-(2-oxopiperidin-1-yl)chromene-6-carbonitrile

3-propylpiperidin-2-one

2,2-二烯丙基哌啶

1-(2,3,4,5-tetrahydropyridin-6-yl)piperidin-2-one

1-(三氟乙酰基)-2-哌啶酮