(S)-2-amino-3-(2-oxocyclopentyl)propanoic acid

benzyl (3aS,6aS)-3,3a,4,5,6,6a-hexahydrocyclopenta[b]pyrrole-2-carboxylate

benzyl N-benzyloxycarbonyl-(1S,3S,5S)-2-azabicyclo[3.3.0]octane-3-carboxylate

(1S,3S,5S)-2-氮杂双环[3,3,0]辛烷-3-羧酸苄酯盐酸盐

(S,S,S)-2-氮杂双环[3,3,0]辛烷-3-羧酸苄酯