Methanesulfonic acid (R)-1-[(S)-benzyloxy-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl)-methyl]-but-3-enyl ester

(S)-4-((1R,2S)-2-Azido-1-benzyloxy-pent-4-enyl)-2,2-dimethyl-[1,3]dioxolane

{(S)-1-[(R)-Benzyloxy-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl)-methyl]-4-hydroxy-butyl}-carbamic acid tert-butyl ester