(4aR,8aR)-3-[1-Butylsulfanyl-meth-(Z)-ylidene]-5,8a-dimethyl-3,4,4a,7,8,8a-hexahydro-1H-naphthalen-2-one

(R)-5',8'a-Dimethyl-3',4',4'a,7',8',8'a-hexahydro-1'H-spiro[[1,3]dioxolane-2,2'-naphthalene]