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

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