3,4-di-O-acetyl-2,6-anhydro-1,5-dideoxy-L-arabino-hex-5-enitol is an intermediate used in the synthesis of 2,6-Dideoxy-2-fluoro-L-galactopyranose 1,3,4-Triacetate (D440910), which is a reactant in the preparation of β-purine-diphosphate sugars (GDP-fucose-analogs)