(3aR,5aS,9aR,9bS)-6,6,9a-Trimethyl-1,3a,4,5a,6,7,9a,9b-octahydro-3H-naphtho[1,2-c]furan-5-one

[(1E,5E)-6-((3S,4R)-4-[1,3]Dioxan-2-ylmethyl-tetrahydro-furan-3-yl)-4,4-dimethyl-hepta-1,5-dienyl]-trimethyl-silane