Benzoic acid (2R,4S)-4-(tert-butoxycarbonyl-methyl-amino)-4-[(S)-1-((1S,2R)-1-carboxy-2-methoxy-2-phenyl-ethylcarbamoyl)-ethylcarbamoyl]-2-methyl-butyl ester

(2S,3R)-2-((S)-2-tert-Butoxycarbonylamino-propionylamino)-3-methoxy-3-phenyl-propionic acid methyl ester

(6S,9R,12S)-methyl 6-((R)-3-(benzoyloxy)-2-methylpropyl)-12-((R)-methoxy(phenyl)methyl)-2,2,5,9-tetramethyl-4,7,10-trioxo-3-oxa-5,8,11-triazatridecan-13-oate

benzoic acid 4-{1-[2-methoxy-1-(1-{[1-(1-methoxycarbonyl-2,4-dimethyl-pent-3-enylcarbamoyl)-3-methyl-butyl]-methyl-carbamoyl}-2-methyl-propylcarbamoyl)-2-phenyl-ethylcarbamoyl]-ethylcarbamoyl}-2-methyl-4-methylamino-butyl ester