[H]OC1=C(C2=C(C([H])=C1[H])[C@@]1(C([H])([H])[H])C([H])([H])C([H])([H])C(=O)[C@](C([H])([H])[H])(C([H])([H])O[H])[C@]1([H])C([H])([H])C2([H])[H])C([H])(C([H])([H])[H])C([H])([H])[H]