(1RS,2SR,5RS,7SR,8SR)-7-t-butyldimethylsilyloxy-3,3,8-trimethylbicyclo<3.3.0>octan-2-ol

(1R,3aS,6S,6aS)-1-Allyl-6-hydroxy-1,5,5-trimethyl-hexahydro-pentalen-2-one