2-Acetylamino-6-(acetyl-benzyloxy-amino)-hexanoic acid tert-butyl ester

(S)-6-(Benzyloxy-formyl-amino)-2-[(1-{(2S,3S)-2-[(R)-2-tert-butoxycarbonylamino-3-(4-methoxy-phenyl)-propionylamino]-3-methyl-pentanoyl}-piperidine-2-carbonyl)-amino]-hexanoic acid

(S)-2-Amino-6-(benzyloxy-formyl-amino)-hexanoic acid

2-Acetylamino-6-(benzyloxy-formyl-amino)-hexanoic acid

(S)-6-(Benzyloxy-formyl-amino)-2-[(1-{(2S,3S)-2-[(R)-2-tert-butoxycarbonylamino-3-(4-methoxy-phenyl)-propionylamino]-3-methyl-pentanoyl}-piperidine-2-carbonyl)-amino]-hexanoic acid 2-trimethylsilanyl-ethyl ester