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

(5R,8S,9R)-8,9-Dihydroxy-6-iodo-1,3-dioxa-spiro[4.4]non-6-en-2-one

(5R,8S,9R)-6-Iodo-8,9-bis-methoxymethoxy-1,3-dioxa-spiro[4.4]non-6-en-2-one

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