C=C1C(=O)O[C@]2(C)CC[C@H]1C[C@@H]1O[C@@]1(C)C/C=C/[C@](C)(OO)CC[C@H]2O (1S,3S,5S,7E,9R,12R,13R)-9-hydroperoxy-12-hydroxy-5,9,13-trimethyl-16-methylidene-4,14-dioxatricyclo[11.3.2.0^{3,5}]octadec-7-en-15-one