methyl (Z)-5-(tert-butyldimethylsilyl)oxy-3-methyl-3-pentenoate

(2E,5Z)-(1R)-7-(tert-butyldiphenylsilyl)oxy-1-{(4R,5S)-2,2-dimethyl-5-[2-(4-methoxybenzyloxy)ethyl]-[1,3]-dioxolan-4-yl}-5-methyl-hepta-2,5-dien-1-ol