(2S)-tert-butyl 6-bromo-2-[(tert-butoxycarbonyl)amino]-5-hydroxyhexanoate

(+)-tert-butyl (2S)-2-[(tert-butoxycarbonyl)amino]-4-[(2S)-oxiranyl]butanoate

4-((S)-2-tert-Butoxycarbonyl-2-tert-butoxycarbonylamino-ethyl)-1-((2R,5S)-5-tert-butoxycarbonyl-5-tert-butoxycarbonylamino-2-hydroxy-pentyl)-3-((S)-3-tert-butoxycarbonyl-3-tert-butoxycarbonylamino-propyl)-5-hydroxy-pyridinium

(2S,5R)-6-Azido-2-tert-butoxycarbonylamino-5-{(S)-2-tert-butoxycarbonylamino-3-[4-(3,5-diiodo-4-methoxy-phenoxy)-3,5-diiodo-phenyl]-propionyloxy}-hexanoic acid tert-butyl ester

(2S)-tert-butyl-2-<(tert-butoxycarbonyl)amino>-4-(2-oxiranyl)-hexanoate

1-tert-butyl (2S,5R)-6-azido-2-[N-(tert-butoxycarbonyl)-amino]-5-hydroxyhexanoate

(2S,5S)-(+)-tert-butyl 2-[(tert-butoxycarbonyl)amino]-5-hydroxy-6-iodohexanoate