tert-butyl syn-(3R,5S)-6-chloro-3,5-(isopropylidenedioxy)-hexanoate;(4R-cis)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid;X6301;(4R-cis)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid,1,1-dimethylethyl ester;t-butyl (4R-cis)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxan-4-ylacetate;