[H]OC1=C([H])C(Br)=C(O[H])C([H])=C1C(=O)C([H])([H])[C@@](O[H])(C([H])([H])[H])C([H])([H])C([H])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H]