(-)-(1R,2S,3R,4R,5R,6S)-5-endo-azido-7-tert-butoxycarbonyl-2,3-exo-isopropylidenedioxy-6-exo-p-toluenesulfonyl-7-azabicyclo[2.2.1]heptane

(+)-(1R,2S,3R,4R,5S,6R)-5-exo-azido-7-tert-butoxycarbonyl-2,3-exo-isopropylidenedioxy-6-endo-p-toluenesulfonyl-7-azabicyclo[2.2.1]heptane

(+)-(1R,2S,3R,4S,5R,6S)-7-tert-butoxycarbonyl-2,3-exo-isopropylidenedioxy-6-endo-p-toluenesulfonyl-7-azabicyclo[2.2.1]heptane-5-endo-ol