for the following products
(-)-1,2:5,6-di-O-Isopropylidene-alpha-D-glucofuranose | (3aR,5S,6aS)-5-(2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethyl-tetrahydro-2H-furo[2,3-d][1,3]dioxol-6-ol | Diacetone-D-glucose and 1,2,5,6-di-O-Isopropylidene-alpha-D-glucofuranose
