C=C1CC/C=C(\C)C[C@@H]2OC(=O)C(=C)[C@H]2C/C=C(\COC(C)=O)CC[C@@H]1OO	(1R*,7S*,14S*,3E,11E)-18-acetoxy-7-hydroperoxycembra-3,8(19),11,15(17)-tetraen-16,14-olide