(S)-6-chloromethyl-5,6-dihydropyran-2-one
(4R-cis)-6-(chloromethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid,1,1-dimethylethyl ester
(4R-cis)-6-[(acetyloxy)methyl]-2,2-dimethyl-1,3-dioxane-4-acetic acid tert-butyl ester
1,1-dimethylethyl (4R-cis)-6-hydroxymethyl-2,2-dimethyl-1,3-dioxane-4-acetate
tert-butyl 2-[(4R,6S)-6-formyl-2,2-dimethyl-1,3-dioxan-4-yl]acetate