(2S,3S)-3-(tert-Butyl-dimethyl-silanyloxy)-2-((4S,5R,4'R)-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-pyrrolidine

(2S,3S)-benzyl 3-((tert-butyldimethylsilyl)oxy)-2-((4S,4'R,5R)-2,2,2',2'-tetramethyl-[4,4'-bi(1,3-dioxolan)]-5-yl)pyrrolidine-1-carboxylate

benzyl (2S,3S)-3-((tert-butyldimethylsilyl)oxy)-2-((4R,5R)-5-((R)-1,2-dihydroxyethyl)-2,2-dimethyl-1,3-dioxolan-4-yl)pyrrolidine-1-carboxylate

(1S)-1-allyl-2-[(9-phenylfluoren-9-yl)-amino]-2-deoxy-3,4,5,6-di-O-isopropylidene-D-mannitol

(2S,3S)-3-(tert-Butyl-dimethyl-silanyloxy)-2-{(4R,5R)-5-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-1-hydroxy-ethyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-pyrrolidine-1-carboxylic acid benzyl ester