(2S,4S)-2-[3-(N,N-dimethylamino)-1-hydroxypropyl]-N-(p-nitrobenzyloxycarbonyl)-4-tritylthiopyrrolidine

(2S,4R)-N-t-butoxycarbonyl-4-t-butyldimethylsilyloxy-2-[1-hydroxy-3-(p-toluenesulfonyloxy)propyl]pyrrolidine

(2S,4R)-4-hydroxy-2-{(R)-1-hydroxy-3-[N-allyloxycarbonyl-N-methylamino]propyl}-N-(p-nitrobenzyloxycarbonyl)pyrrolidine

(3R,5S)-N-tert-butoxycarbonyl-3-tert-butyldimethylsilyloxy-5-((R)-1,3-dihydroxypropyl)pyrrolidine

(2S,4S)-4-acetylthio-2-[1-hydroxy-3-(N-allyloxycarbonyl-N-methylamino)propyl]-N-(p-nitrobenzyloxycarbonyl)pyrrolidine

(2S,4R)-2-[(R)-3-(Allyloxycarbonyl-methyl-amino)-1-hydroxy-propyl]-4-(tert-butyl-dimethyl-silanyloxy)-pyrrolidine-1-carboxylic acid tert-butyl ester

(2S,4R)-N-t-butoxycarbonyl-4-t-butyldimethylsilyloxy-2-(2-ethoxycarbonyl-1-hydroxyethyl)pyrrolidine