(2R,5S,7R,8S)-2-Butyl-2-((S)-2,2-diethyl-[1,3]dioxolan-4-yl)-7-((E)-3-iodo-but-2-enyl)-8-methyl-1,6-dioxa-spiro[4.5]decane

(2E,4E)-5-Iodo-3-methyl-penta-2,4-dienoic acid 2-trimethylsilanyl-ethyl ester

(2E,6E)-(4S,5R)-7-Iodo-4-methyl-5-triisopropylsilanyloxy-hepta-2,6-dienoic acid 2-trimethylsilanyl-ethyl ester

(2E,6E,8E)-(4S,5S)-10-((2R,5S,7R,8S)-2-Butyl-2-formyl-8-methyl-1,6-dioxa-spiro[4.5]dec-7-yl)-4,8-dimethyl-5-triisopropylsilanyloxy-deca-2,6,8-trienoic acid 2-trimethylsilanyl-ethyl ester

(E)-3-Methyl-4-oxo-but-2-enoic acid 2-trimethylsilanyl-ethyl ester