for the following products
(S)-2,2-Dimethyl-[1,3]dioxcdane-4-carboxylic acid methyl ester | (S)-Methyl 2,2-dimethyl-1,3-dioxolane-4-carboxylate | Methyl (S)-(-)-2,2-dimethyl-1,3-dioxolane-4-carboxylate and Methyl alpha beta-isopropylidene-L-glycerate
