CC1=C2CC/C(C)=C/CC[C@]3(C)O[C@@H]3CC/C(C)=C/[C@H]2OC1	(1R,2E,6R,8S,11E)-3,8,12,16-tetramethyl-7,18-dioxatricyclo[13.3.0.0^{6,8}]octadeca-2,11,15-triene