(2R)-1-{(2R,4R,6R,8R,9S)-4-[tert-butyl(diphenyl)silyloxy]-8,9-dimethyl-1,7-dioxaspiro[5.5]undecan-2-yl}-3-methylbut-3-en-2-ol

(2S,4R,6R,8R,9S)-4-[tert-butyl(diphenyl)silyloxy]-8,9-dimethyl-2-[2-(4-methoxyphenoxy)ethyl]-1,7-dioxaspiro[5.5]undecane

(2R,4R,6R,8R,9S)-4-hydroxy-8,9-dimethyl-2-[2-(4-methoxyphenoxy)ethyl]-1,7-dioxaspiro[5.5]undecane

ethyl 2-ethyl-4-methoxy-5-methylbenzoate

(2R,4R,6R,8R,9S)-4-<(tert-butyldiphenylsilyl)oxy>-2-(2-hydroxyethyl)-8,9-dimethyl-1,7-dioxaspiro<5.5>undecane