(+)-(E)-((1S,2R)-2-(2-phenylpropan-2-yl)cyclohexyl)-2-((3aS,4R,5R,6aS)-5-(tert-butyldimethylsilyloxy)-4-((3S,4S,E)-3-(tert-butyldimethylsilyloxy)-4-methyloct-1-en-6-ynyl)hexahydropentalen-2(1H)-ylidene)acetate