Methanesulfonic acid (R)-1-{(4S,5R)-5-[(R)-1-tert-butoxycarbonylamino-2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-ethyl ester

(S)-tert-Butoxycarbonylamino-((4S,5R,4'R)-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-acetic acid methyl ester

[(R)-1-((4R,5S)-2,2-Dimethyl-5-(R)-oxiranyl-[1,3]dioxolan-4-yl)-2-hydroxy-ethyl]-carbamic acid tert-butyl ester

[(R)-2-Hydroxy-1-((4S,5R,4'R)-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-ethyl]-carbamic acid tert-butyl ester

1-O-(tert-butyldimethylsilyl)oxy-2-tert-butylcarbonylamino-2-deoxy-3,4-O-isopropylidene-5,6-epoxy-D-mannitol