(R)-8-((3aR,5S,6aR)-2,2-Dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-8-hydroxy-oct-5-ynoic acid

3-deoxy-1,2-O-isopropylidene-5-O-(thiocarbonylimidazolyl)-6-O-tosyl-α-D-ribo-hexofuranose

(Z)-(R)-8-Acetoxy-8-((3aR,5S,6aR)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-oct-5-enoic acid methyl ester