(5R,8S,9R)-8,9-Bis-(tert-butyl-dimethyl-silanyloxy)-6-iodo-2,2-dimethyl-1,3-dioxa-spiro[4.4]non-6-ene

(3R,4S,5S)-4,5-Bis-methoxymethoxy-hepta-1,6-dien-3-ol