(2S)-{(1'S,2'S)-1',2'-(isopropylidenedioxy)-3'-[(p-toluenesulfonyl)oxy]propyl}-N-(2-nitrobenzenesulfonyl)-3,4-dehydro-piperidine

(2S)-{(1'S,2'S)-1',2'-dihydroxy-3'-[(p-toluenesulfonyl)oxy]propyl}-N-(2-nitrobenzenesulfonyl)-3,4-dehydropiperidine

(3E,5S,6S,7S)-8-[(tert-butyldimethylsilyl)oxy]-6,7-(isopropylidenedioxy)-5-[(2-nitrobenzenesulfonyl)amino]-oct-3-ene

(3E,5S,6S,7S)-8-[(tert-butyldimethylsilyl)oxy]-6,7-(isopropylidenedioxy)-5-[(2-nitrobenzenesulfonyl)(but-3-enyl)amino]-oct-3-ene

(2R,3S,4S,5S)-2,3-Bis-(tert-butyl-dimethyl-silanyloxy)-5-[(4S,5S)-5-(tert-butyl-dimethyl-silanyloxymethyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-4,5-dihydroxy-pentanal