C/C1=C\CC(=O)/C(C)=C/[C@@H]2[C@@H](CC/C(C)=C/CC1)C2(C)C	(1R,2E,6E,10E,14R)-3,7,11,15,15-pentamethylbicyclo[12.1.0]pentadeca-2,6,10-trien-4-one