螺[3H-吲哚-3,3'-吡咯烷]-2(1H)-酮

1-[4-(trifluoromethoxy)phenyl]piperidin-4-ol

4-prop-2-enoxypiperidine

(4-羟基-1-哌啶基)(苯基)甲酮

4-(2-乙氧基-2-氧代亚乙基)哌啶-1-羧酸苄酯