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

4-[[(1,1-二甲基乙氧基)羰基]氨基]-2-环戊烯-1-羧酸甲酯

二碳酸二叔丁酯

(-)-methyl (1S,4R)-4-amino-cyclopent-2-ene-1-carboxylate hydrochloride

(3aR,5R,6R,6aR)-6-bromo-2-oxo-hexahydrocyclopentaoxazole-5-carboxylic acid methyl ester