[H]OC(C([H])([H])[H])(C([H])([H])[H])[C@]1([H])C([H])([H])C(=O)O[C@]2(C([H])([H])[H])[C@]3([H])[C@]([H])(O[C@]([H])(C([H])([H])C(=O)OC([H])([H])[H])[C@@]13C([H])([H])[H])C([H])([H])[C@@]1(C([H])([H])[H])[C@]([H])(C3=C([H])OC([H])=C3[H])C([H])([H])[C@@]3([H])O[C@@]213