(3R,4R,5R)-3-Butyl-4,5-dihydroxy-cyclohex-1-enecarboxylic acid methyl ester

(4aR,6S,8R,8aR)-8-Butyl-2,3-dimethoxy-2,3-dimethyl-6-triethylsilanyloxy-octahydro-benzo[1,4]dioxine-6-carboxylic acid methyl ester