4-{6-[6,11-bis-(tert-butyl-dimethyl-silanyloxy)-10-(4-methoxy-benzyloxy)-13-(4-methyl-3,6-dihydro-2H-pyran-2-yl)-4-methylene-trideca-7,12-dienyl]-5-methoxy-5,6-dihydro-2H-pyran-2-yl}-but-2-ynoic acid

(2E,7E)(5S,6S)-6-(tert-butyldimethylsilyloxy)-5-(4-methoxy-benzyloxy)-8-((2S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-octa-2,7-dienal