(R)-2-[(2S,3R)-2-(9H-Fluoren-9-ylmethoxycarbonylamino)-3-hydroxy-butyrylamino]-3-hydroxy-propionic acid methyl ester

(S)-2-{(1S,2R)-1-[(2S,3R)-2-Azido-3-(tert-butyl-dimethyl-silanyloxy)-butyrylamino]-2-triethylsilanyloxy-propyl}-4,5-dihydro-thiazole-4-carboxylic acid methyl ester

(2S,3R)-2-Azido-3-(tert-butyl-dimethyl-silanyloxy)-butyric acid

(R)-2-{(2S,3R)-2-[(2S,3R)-2-Azido-3-(tert-butyl-dimethyl-silanyloxy)-butyrylamino]-3-triethylsilanyloxy-thiobutyrylamino}-3-hydroxy-propionic acid methyl ester

(R)-2-{(2S,3R)-2-[(2S,3R)-2-Azido-3-(tert-butyl-dimethyl-silanyloxy)-butyrylamino]-3-triethylsilanyloxy-thiobutyrylamino}-3-triethylsilanyloxy-propionic acid methyl ester