tert-butyl (1R,4S,5R,6S)-5-hydroxy-6-[(4-methylphenyl)sulfonyl]-7-azabicyclo[2.2.1]hept-2-ene-7-carboxylate

5-Oxo-6-(toluene-4-sulfonyl)-7-aza-bicyclo[2.2.1]hept-2-ene-7-carboxylic acid tert-butyl ester

tert-butyl (1R,2S,3R,4S,5R,6S)-2,3,5-trihydroxy-6-[(4-methylphenyl)sulfonyl]-7-azabicyclo[2.2.1]heptane-7-carboxylate

(+)-(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