2-[2-([3S-(3α,3aα,7aβ)]-3-(1,1-dimethylethoxy)-2,3,3a,4,7,7a-hexahydro-3a-methyl-1H-inden-5-yl)ethyl]-2-methyl[1,3]dioxolane

[1S-(1α,3aβ,7aα)]-1-(1,1-dimethylethoxy)octahydro-3a-methyl-6-[2-(2-methyl-1,3-dioxolan-2-yl)ethyl]-5H-inden-5-one