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

(S)-2-[(4R,5R,6R)-2,2-Di-tert-butyl-6-((1R,2R)-2-hydroxy-1-methyl-butyl)-5-methyl-[1,3,2]dioxasilinan-4-yl]-1-((1R,5S,7S)-10,10-dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]dec-4-yl)-propan-1-one