Benzo[1,3]dioxole-5-sulfonic acid ((2R,3S)-3-amino-2-hydroxy-4-phenyl-butyl)-(5-cyano-2,2-dimethyl-pentyl)-amide

[(1S,2R)-1-Benzyl-3-((S)-3-tert-butylcarbamoyl-4,4-dimethyl-pentanoylamino)-2-hydroxy-propyl]-carbamic acid tert-butyl ester

tert-Butyl N-(1S,2R)-1-benzyl-3-[(4-cyanobutyl)amino]-2-hydroxypropyl carbamate

{(1S,2R)-1-Benzyl-3-[(S)-2-(tert-butylcarbamoyl-methyl)-3,3-dimethyl-butyrylamino]-2-hydroxy-propyl}-carbamic acid tert-butyl ester