3-(2-{[2-((S)-1-tert-Butoxycarbonylamino-2-methyl-propyl)-oxazole-4-carbonyl]-amino}-acetyl)-indole-1-carboxylic acid methyl ester

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

2''-[1-(tert-butoxycarbonyl)amino-2-methylpropyl]-4-formylteroxazole

2''-[1-(tert-butoxycarbonyl)amino-2-methylpropyl]-4-hydroxymethylteroxazole