(-)-(4R,5R,6S)-6-acetamido-N-(benzyloxycarbonyl)-4,5-(isopropylidenedioxy)-3-piperidinone

(+)-(2R,3R,4S)-5-benzyloxycarbonylamino-4-(t-butyldimethylsilyloxy)-2,3-(isopropylidenedioxy)-1-pentanol

(3aS,4R,7aR)-4-Acetylamino-7-formyl-2,2-dimethyl-3a,7a-dihydro-4H-[1,3]dioxolo[4,5-c]pyridine-5-carboxylic acid benzyl ester

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

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