N2-((2S,3S)-4-((3-(2H-tetrazol-5-yl)phenyl)amino)-3-hydroxy-4-oxo-1-phenylbutan-2-yl)-N6-((R)-1-(4-fluorophenyl)ethyl)-4-oxo-4H-pyran-2,6-dicarboxamide

N2-((2S,3S)-4-((3-(2H-tetrazol-5-yl)phenyl)amino)-3-hydroxy-4-oxo-1-phenylbutan-2-yl)-N6,N6-dibenzyl-4-oxo-4H-pyran-2,6-dicarboxamide

[(1S,2S)-1-Benzyl-3-((2S,4S)-2-tert-butylcarbamoyl-4-chloro-pyrrolidin-1-yl)-2-hydroxy-3-oxo-propyl]-carbamic acid tert-butyl ester

((1S,2S)-1-Benzyl-2-hydroxy-3-{(R)-4-[(2-hydroxy-4,6-dimethyl-pyridin-3-ylmethyl)-carbamoyl]-5,5-dimethyl-thiazolidin-3-yl}-3-oxo-propyl)-carbamic acid tert-butyl ester

(R)-2-Amino-3-methylsulfanyl-propionic acid (1S,2S)-2-benzyloxycarbonylamino-1-((R)-4-tert-butylcarbamoyl-thiazolidine-3-carbonyl)-3-phenyl-propyl ester