4-(甲苯-4-磺酰氧)哌啶-1-羧酸叔丁酯

1-(4-methylphenyl)sulfonylpiperidin-4-one

N-fmoc-4-羟基哌啶

乙基4-哌啶基亚基乙酸酯

N-(2-苯乙基)-4-羟基哌啶