(E)-(S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-[(2R,6S)-6-((2S,3R)-2-methoxy-3-methyl-4-oxo-butyl)-5,6-dihydro-2H-pyran-2-yl]-2-methyl-hex-2-enoic acid methyl ester

(2S,3R,4R,5R,6S)-2-Allyl-6-methyl-tetrahydro-pyran-3,4,5-triol