1-((4'aS,8'S,8'aS)-5'-Methylene-octahydro-spiro[[1,3]dioxolane-2,2'-naphthalen]-8'-yl)-ethanone

4-acetylhex-3-enone 1-ethylene ketal

(4aS,8S,8aS)-8-(1-Hydroxy-ethyl)-2-methyl-5-methylene-decahydro-naphthalen-2-ol