C/C1=C\C[C@]2(C)CC=C(C(C)C)[C@H]2C[C@H](O)/C(C)=C/CC1 (3aR,5E,9E,11S,12aS)-3a,6,10-trimethyl-1-propan-2-yl-4,7,8,11,12,12a-hexahydro-3H-cyclopenta[11]annulen-11-ol