2-((S)-1-{[2-((S)-1-{[(4S,5R)-2-((S)-1-Benzyloxycarbonylamino-2-methyl-propyl)-5-methyl-4,5-dihydro-oxazole-4-carbonyl]-amino}-2-methyl-propyl)-oxazole-4-carbonyl]-amino}-2-methyl-propyl)-thiazole-4-carboxylic acid ethyl ester

2-((S)-1-(2-((S)-1-((tert-butoxycarbonyl)amino)-2-methylpropyl)oxazole-4-carboxamido)-2-methylpropyl)oxazole-4-carboxylic acid

((S)-1-{4-[2-(1H-Indol-3-yl)-2-oxo-ethylcarbamoyl]-oxazol-2-yl}-2-methyl-propyl)-carbamic acid tert-butyl ester

3-[2'-((S)-1-tert-Butoxycarbonylamino-2-methyl-propyl)-[2,4']bioxazolyl-5-yl]-indole-1-carboxylic acid methyl ester

2'-((S)-1-tert-Butoxycarbonylamino-2-methyl-propyl)-5-(1H-indol-3-yl)-[2,4']bioxazolyl-4-carboxylic acid methyl ester