(2E,4E)-6-[(2R,3S,6S,8S,9R)-9-Butyl-9-(tert-butyl-dimethyl-silanyloxy)-8-ethynyl-3-methyl-1,7-dioxa-spiro[5.5]undec-2-yl]-4-methyl-hexa-2,4-dienal

succinic acid 3-butyl-8-[6-(tert-butyl-dimethyl-silanyloxy)-8-hydroxy-3,7-dimethyl-octa-2,4-dienyl]-9-methyl-2-[3-methyl-4-(2-trimethylsilanyl-ethoxycarbonyl)-buta-1,3-dienyl]-1,7-dioxa-spiro[5.5]undec-3-yl ester 2-trimethylsilanyl-ethyl ester

(4E,6E)-(2S,3S)-8-[(2R,3S,6S,8S,9R)-9-Butyl-9-(tert-butyl-dimethyl-silanyloxy)-8-ethynyl-3-methyl-1,7-dioxa-spiro[5.5]undec-2-yl]-2,6-dimethyl-octa-4,6-diene-1,3-diol

(2S,3R,6S,8R,9S)-8-[(2E,4E)-(6S,7S)-6,8-Bis-(tert-butyl-dimethyl-silanyloxy)-3,7-dimethyl-octa-2,4-dienyl]-3-butyl-2-ethynyl-9-methyl-1,7-dioxa-spiro[5.5]undecan-3-ol