(1R.3S.Z)-3-(tert-butyldimethylsilyloxy)-5-((E)-2-((1R.3aS.7aR)-1-((R)-6-hydroxy-6-methylheptan-2-yl)-7a-methyldihydro-1H-inden-4(2H.5H.6H.7H.7aH)-ylidene)ethylidene)-4-methylenecyclohexanol