(2S,4R,4aS,6R,8aR)-6-But-3-enyl-2-(tert-butyl-dimethyl-silanyloxymethyl)-6-methoxy-3-methylene-octahydro-pyrano[3,2-b]pyran-4-ol

(2R,4aR,6S,8R,8aR)-2-But-3-enyl-8-(tert-butyl-dimethyl-silanyloxy)-6-(tert-butyl-dimethyl-silanyloxymethyl)-2-methoxy-7-methylene-octahydro-pyrano[3,2-b]pyran

((2S,4R,4aR,6R,8aR)-4-(benzyloxy)-6-(but-3-en-1-yl)-6-methoxy-3-methyleneoctahydropyrano-[3,2-b]pyran-2-yl)methanol