1-(5-乙基-2-嘧啶)-4-羟基哌啶

3-乙酰基-4-氧代-1-哌啶羧酸-1,1-二甲基乙酯

benzyl 4-(4-fluorophenyl)-4-hydroxypiperidine-1-carboxylate

4-(苄氧基)哌啶-1-羧酸叔丁酯

1-甲基-4-哌啶醇