(((1R,3S,E)-5-(2-((1R,3aS,7aR,E)-7a-Methyl-1-((R)-6-methylheptan-2-yl)octahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diyl)bis(oxy))bis(tert-butyldimethylsilane) 1g

(((1R,3S,E)-5-(2-((1R,3aS,7aR,E)-7a-Methyl-1-((R)-6-methylheptan-2-yl)octahydro-4H-inden-4-ylidene)ethylidene)-4-methylenecyclohexane-1,3-diyl)bis(oxy))bis(tert-butyldimethylsilane) 1g