(E)-5-[(3aS,4R,5R,6aS)-5-(tert-Butyl-dimethyl-silanyloxy)-4-[(1E,6Z)-(S)-3-(tert-butyl-dimethyl-silanyloxy)-4-methyl-octa-1,6-dienyl]-hexahydro-pentalen-(2E)-ylidene]-pent-3-enoic acid methyl ester

(E)-5-[(3aS,4R,5R,6aS)-5-(tert-Butyl-dimethyl-silanyloxy)-4-[(E)-(S)-3-(tert-butyl-dimethyl-silanyloxy)-4-methyl-oct-1-en-6-ynyl]-hexahydro-pentalen-(2E)-ylidene]-pent-3-enoic acid methyl ester