(4aS,5S,6S,8aS)-6-(tert-butyldimethylsiloxy)-5-(tert-butyldimethylsiloxypropyl)-5,8a-dimethyl-decahydronaphthalen-1-one 1-ethylene acetal

(4aS,5S,6S,8aS)-(-)-2,4,4a,5,6,7,8,8a-Octahydro-6-hydroxy-5,8a-dimethyl-5-(prop-2-enyl)naphthalen-1(2H)-one 1-(Ethylene Acetal)