CC1=C2CC/C(C)=C/CC[C@]3(C)O[C@H]3CC[C@@](C)(O)/C=C/2OC1=O	(1Z,3R,6S,8S,11E)-3-hydroxy-3,8,12,16-tetramethyl-7,18-dioxatricyclo[13.3.0.06,8]octadeca-1,11,15-trien-17-one