(2R,3S)-2-amino-3-(tert-butyldimethylsilanyloxy)-4-methyl-pentan-1-ol

(2S,3S)-3-{4-[2-((S)-2-Benzyloxycarbonylamino-4-methyl-pentanoylamino)-1-hydroxy-ethyl]-phenoxy}-2-tert-butoxycarbonylamino-4-methyl-pentanoic acid

(Z)-(3S,4S,7S)-4-Amino-7-isobutyl-3-isopropyl-2-oxa-6,9-diaza-bicyclo[10.2.2]hexadeca-1(15),10,12(16),13-tetraene-5,8-dione

(2S,3S)-3-[4-(2-Benzyloxycarbonyl-acetyl)-phenoxy]-2-tert-butoxycarbonylamino-4-methyl-pentanoic acid 2-trimethylsilanyl-ethyl ester

(2S,3S)-3-(4-{2-Benzyloxycarbonyl-2-[(Z)-hydroxyimino]-acetyl}-phenoxy)-2-tert-butoxycarbonylamino-4-methyl-pentanoic acid 2-trimethylsilanyl-ethyl ester