(1S,4aR,8aR)-2-[1,3]Dioxolan-2-yl-1-(methoxy-trimethylsilanyl-methyl)-5,5,8a-trimethyl-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-ol

2-{(4aR,8aR)-1-[1-Methoxy-meth-(Z)-ylidene]-5,5,8a-trimethyl-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-2-yl}-[1,3]dioxolane

5,5,9-Trimethyl-2-formyl-Δ2-trans-1-octalone