for the following products
((3aR,6S,6aR)-6-(Benzyloxy)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxole-5,5-diyl)dimethanol | 3-O-Benzyl-4-(hydroxymethyl)-1,2-o-isopropylidene-a-D-ribofuranose and 3-O-Benzyl-4-(hydroxymethyl-1,2-O-isopropylidene-alpha-D-erythropentofuranose
