((3aR,4S,6R,6aS)-6-Hydroxy-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-yl)-carbamic acid tert-butyl ester

(+)-2,3:5,6-di-O-isopropylidene-α-D-mannofuranos-3-yl benzoate

(3S,4R,5S)-benzoyl(tert-butylcarbonyl)amino-4,5-isopropylidenedioxycyclopent-1-ene

(1R,2R,3R,4S)-1-methanesulfonyloxy-2,3-dioxyisopropylidene-4-amino-(tert-butoxycarbonyl)-1,2,3-cyclopentanetriol

(1R,4S)-N--2,3-oxazabicyclo<2.2.1>hept-5-ene