(+)-(2S,3R,4S)-2-acetamido-N-(benzyloxycarbonyl)-5,6-didehydro-3,4-O-isopropylidene-5-(nitromethyl)-3,4-piperidinediol

(+)-(2S,3R,4R,5S)-N-(benzyloxycarbonyl)-5-O-(t-butyldimethylsilyl)-3,4-O-isopropylidene-2-phthalimido-3,4,5-piperidinetriol

(-)-(4S,5R,6S)-6-acetamido-N-(benzyloxycarbonyl)-2,3-didehydro-4,5-(isopropylidenedioxy)-3-piperidinecarboxylic acid methoxyethoxymethyl ester

(+)-(2S,3R,4S,5R)-2-acetamido-N-(benzyloxycarbonyl)-5-(hydroxymethyl)-3,4-O-isopropylidene-3,4-piperidinediol

5-amino-4-O-(t-butyldimethylsilyl)-5-deoxy-2,3-O-isopropylidene-L-1,5-ribonolactam