重氮甲烷

(1R,3S,4S)-3-((tert-butoxycarbonyl)amino)-4-hydroxycyclopentanecarboxylic acid

二碳酸二叔丁酯

(1R-4S)-4-[[(1,1-二甲基乙氧基)羰基]氨基]- 2-环戊烯-1-羧酸甲酯

(3R,4S)-4-tert-butoxycarbonylamino-3-hydroxycyclopent-1-enecarboxylic acid