C=C1CC[C@@H](C)/C(C)=C\[C@@H]2[C@@H]1CC[C@@]2(C)O (3R,3aR,4Z,6R,9aS)-3,5,6-trimethyl-9-methylidene-2,3a,6,7,8,9a-hexahydro-1H-cyclopenta[8]annulen-3-ol