4-{(2R,6R)-6-[(7E,12E)-(2S,6S,10S,11S)-6,11-Bis-(tert-butyl-dimethyl-silanyloxy)-10-(4-methoxy-benzyloxy)-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-yn-1-ol

(E)-(1R,7S,11S,15S,17R)-11-Hydroxy-7-[(E)-(S)-1-hydroxy-3-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-allyl]-15-methyl-13-methylene-6,21-dioxa-bicyclo[15.3.1]henicosa-9,19-dien-3-yn-5-one