methyl 4-(1-hydroxy-3-(phenylthio)propyl)-2,2-dimethyl-1,3-dioxolane-4-carboxylate

9-hydroxy-2,2-dimethyl-7-(phenylsulfinyl)-1,3-dioxaspiro[4.4]nonan-6-one

methyl 4-(1-hydroxy-3-(phenylsulfinyl)propyl)-2,2-dimethyl-1,3-dioxolane-4-carboxylate

9-Hydroxy-2,2-dimethyl-1,3-dioxa-spiro[4.4]non-7-en-6-one