(4S,5S,6S)-4-((S)-2-Benzyloxy-1-methyl-ethyl)-2,2-di-tert-butyl-6-[(S)-3-((2R,4R,6S)-4-methoxy-6-methyl-tetrahydro-pyran-2-yl)-1-methyl-prop-2-ynyl]-5-methyl-[1,3,2]dioxasilinane

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