(R)-2-[(4R,6R)-2,2-Di-tert-butyl-6-((R)-1,3-dimethyl-2,4-dioxo-hexyl)-5-methyl-[1,3,2]dioxasilinan-4-yl]-4-methyl-heptane-3,5-dione

(S)-2-[(4R,5R,6S)-2,2-Di-tert-butyl-6-((S)-2-hydroxy-1-methyl-ethyl)-5-methyl-[1,3,2]dioxasilinan-4-yl]-propan-1-ol

(S)-2-[(4S,6S)-2,2-Di-tert-butyl-6-((S)-2-hydroxy-1-methyl-ethyl)-5-methyl-[1,3,2]dioxasilinan-4-yl]-propan-1-ol

(R)-2-[(4S,5S,6R)-2,2-Di-tert-butyl-6-((R)-1,3-dimethyl-2,4-dioxo-hexyl)-5-methyl-[1,3,2]dioxasilinan-4-yl]-4-methyl-heptane-3,5-dione