(R)-5-((S)-hydroxy((4S,5R)-5-(hydroxymethyl)-2,2-dimethyl-1,3-dioxolan-4-yl)methyl)dihydrofuran-2(3H)-one

(5R)-5-[(1'S,2'R,3'R)-4'-azido-2',3'(isopropylidenedioxy)-1'-(methanesulfonyloxy)butyl]tetrahydrofuran-2-one

(S)-((4R,5R)-2,2-dimethyl-5-(((methylsulfonyl)oxy)methyl)-1,3-dioxolan-4-yl)((R)-5-oxotetrahydrofuran-2-yl)methyl methanesulfonate

(R)-5-((S)-((4S,5R)-5-(((tert-butyldimethylsilyl)oxy)methyl)-2,2-dimethyl-1,3-dioxolan-4-yl)(hydroxy)methyl)dihydrofuran-2(3H)-one