(S)-1-((3aR,5S,6S,6aR)-6-azido-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl)ethane-1,2-diyl diacetate

(R)-2-((3aR,5S,6S,6aR)-6-azido-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl)-2-((methylsulfonyl)oxy)ethyl acetate