Trifluoro-methanesulfonic acid (3R,4R,5S)-4-azido-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2-oxo-tetrahydro-furan-3-yl ester

Trifluoro-methanesulfonic acid (3aR,6S,6aR)-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl ester