(1R,3aR,6R,6aR)-(+)-6-(Benzoyloxy)-3,3a,4,5,6,6a-hexahydro-1,5,5-trimethyl-2(1H)-pentalenon

(3aS,3bR,4R,6aS)-3,3a,3b,4,5,6,6a,7-octahydro-3a,5,5-trimethyl-4-(trimethylsiloxy)cyclopentapentalen-2-one