1-Boc-4-(4-甲氧基-4-氧基-2-丁稀)哌啶

1-N-Boc-O-甲磺酰－羟乙基哌啶

4-(1-溴-2-氧代乙基)哌啶-1-羧酸叔丁酯

1-Boc-4-[2-(甲苯-4-磺酰氧基)-乙基]-哌啶

1-BOC-4-(4-溴丁基)-哌啶