C=C1C(=O)O[C@]2(C)CC[C@@H]1C[C@@H]1O[C@@]1(C)CC(=O)/C=C(\C)CC[C@@H]2OC(C)=O	(1R,3S,5S,8E,12S,13R)-5,9,13-trimethyl-16-methylidene-7,15-dioxo-4,14-dioxatricyclo[11.3.2.0^{3,5}]octadec-8-en-12-yl acetate