(3R,5R,6S)-6-[(S)-2-(tert-Butyl-diphenyl-silanyloxy)-1-methyl-ethyl]-5-(2-hydroxy-ethyl)-3-methyl-tetrahydro-pyran-2-one

(E)-(2R,3S)-1-{(2S,3R,5S)-2-[(S)-2-(tert-Butyl-diphenyl-silanyloxy)-1-methyl-ethyl]-5-methoxy-tetrahydro-furan-3-yl}-7-((4R,5R)-4-ethyl-2,2-dimethyl-[1,3]dioxan-5-yl)-2,6-dimethyl-hept-6-en-4-yn-3-ol