[(1S,2S)-1-Benzyl-3-((R)-4-tert-butylcarbamoyl-5,5-dimethyl-thiazolidin-3-yl)-2-hydroxy-3-oxo-propyl]-carbamic acid benzyl ester

(R)-N-tert-butyl-3-[(2S,3S)-3-[(S)-2-(tert-butoxycarbonyl)aminosuccinamyl]amino-2-hydroxy-4-phenylbutanoyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxamide

Acetic acid 3-[(1S,2S)-1-benzyl-3-((R)-4-tert-butylcarbamoyl-5,5-dimethyl-thiazolidin-3-yl)-2-hydroxy-3-oxo-propylcarbamoyl]-2-ethyl-phenyl ester

(S)-2-tert-Butoxycarbonylamino-3-methyl-butyric acid (1S,2S)-2-benzyloxycarbonylamino-1-((R)-4-tert-butylcarbamoyl-5,5-dimethyl-thiazolidine-3-carbonyl)-3-phenyl-propyl ester

(R)-2-tert-Butoxycarbonylamino-3-methylsulfanyl-propionic acid (1S,2S)-2-benzyloxycarbonylamino-1-((R)-4-tert-butylcarbamoyl-5,5-dimethyl-thiazolidine-3-carbonyl)-3-phenyl-propyl ester