1-((2R,3S,4aR,8aS)-3-((tert-butyldimethylsilyl)oxy)-6-methoxy-2-methyloctahydropyrano[3,2-b]pyran-2-yl)propan-2-ol

ethyl (E)-3-(((2S,3R,4aS,6R,7S,8aR)-2-(2-(1,3-dithian-2-yl)ethyl)-6-allyl-7-((tert-butyldimethylsilyl)oxy)-7,8a-dimethyloctahydropyrano[3,2-b]pyran-3-yl)oxy)acrylate

[(2R,3S)-3-(tert-Butyl-dimethyl-silanyloxy)-6-methoxy-tetrahydro-pyran-2-yl]-methanol