(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