(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

((3S,4S,7S)-7-Isobutyl-3-isopropyl-5,8,11-trioxo-2-oxa-6,9-diaza-bicyclo[10.2.2]hexadeca-1(15),12(16),13-trien-4-yl)-carbamic acid tert-butyl ester