(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

(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

6-(tert-butyl-dimethyl-silanyloxy)-5-(4-methoxy-benzyloxy)-8-(4-methyl-3,6-dihydro-2H-pyran-2-yl)-octa-2,7-dienoic acid methyl ester