2-氧代哌啶-1-羧酸苄酯

1-(4-硝基苯基)-2-哌啶酮

4,5,6,7-四氢-1-(4-甲氧基苯基)-7-氧代-6-[4-(2-氧代-1-哌啶基)苯基]-1H-吡唑并[3,4-c]吡啶-3-羧酸乙酯

5,6,7,8-四氢-咪唑[1,2-A]吡啶

N-乙酰基-2-哌啶酮