(1S,4S,5R,8R)-4-acetamido--8-benzyloxy-3-(tert-butyldimethylsilyloxy)-2,6-dioxabicyclo[3.3.0]octane

(1S,3R,4R,5S,8R)-8-benzyloxy-3,4-isopropylidenedioxy-2,6-dioxabicyclo[3.3.0]octane

(3aR,3bS,5S,6R,6aR,7aR)-2,2-Dimethyl-5-phenyl-hexahydro-furo[2',3':4,5]furo[2,3-d][1,3]dioxol-6-ol

(3aR,3bS,5S,6S,6aR,7aR)-2,2-Dimethyl-5-phenyl-hexahydro-furo[2',3':4,5]furo[2,3-d][1,3]dioxol-6-ol