(2S,3R,5S,8R,10S)-2-((1R,3R)-1,5-Bis-benzyloxy-3-methyl-pentyl)-3-hydroxy-8,10-dimethyl-1-oxa-6-aza-spiro[4.5]decane-6-carboxylic acid tert-butyl ester

(2R,3S,4R,6R)-1-[2-((1S,3R)-4-Azido-1,3-dimethyl-butyl)-[1,3]dithian-2-yl]-4,8-bis-benzyloxy-6-methyl-octane-2,3-diol

{(2R,4S)-4-[(4R,5S)-5-((1R,3R)-1,5-Bis-benzyloxy-3-methyl-pentyl)-4-hydroxy-2-methoxy-tetrahydro-furan-2-yl]-2-methyl-pentyl}-carbamic acid tert-butyl ester

(2R,3R,5S,8R,10S)-8,10-Dimethyl-2-((1R,3S)-3-methyl-5-oxo-1-triethylsilanyloxy-pentyl)-3-triethylsilanyloxy-1-oxa-6-aza-spiro[4.5]decane-6-carboxylic acid tert-butyl ester

(2R,3R,5S,8R,10S)-2-((1R,3R)-5-Acetoxy-3-methyl-1-triethylsilanyloxy-pentyl)-8,10-dimethyl-3-triethylsilanyloxy-1-oxa-6-aza-spiro[4.5]decane-6-carboxylic acid tert-butyl ester