4-(4-氧代哌啶-1-基)哌啶-1-羧酸苄酯

7-氯-2-氧代-1,2-二氢螺[哌啶-4,4-吡啶并[2,3-d][1,3]噁嗪]-1-羧酸苄酯

1-phenyl-3,4,5,6,7,8-hexahydro-1,6-naphthyridin-2-one

4-异丙氧基哌啶

4-甲基-4-羟基哌啶盐酸盐