(1R,2S,4R)-1-(2,2-pentamethylene-1,3-dioxolan-4-yl)-2-methoxy-4-methylpentan-5-ol

(2R,S,3R,5S,6R)-2,5-dimethoxy-6-(hydroxymethyl)-3-methyltetrahydropyran

<2S,3R,5S,6S,6(1R)>-2,5-dimethoxy-6-(1-methoxy-3-methyl-2-oxobutyl)-3-methyltetrahydropyran