(1-tert-butoxycarbonyl-1,2,5,6-tetrahydropyridin-4-yl)acetic acid ethyl ester

4-(2-氧代乙基)哌啶-1-羧酸叔丁酯

4-苯基-1-哌啶羧酸叔丁酯

3,6-二氢-4-[[(三氟甲基)磺酰]氧基]-1(2H)-吡啶甲酸叔丁酯

4,4-(乙烯二氧基)-1-叔丁氧羰基哌啶