[H]OC1=C([H])C(=C2O[C@](C([H])([H])[H])(C([H])([H])C([H])([H])C(\[H])=C(/C([H])([H])[H])C([H])([H])C([H])([H])C(\[H])=C(/C([H])([H])[H])C([H])([H])C([H])([H])C([H])=C(C([H])([H])[H])C([H])([H])[H])C([H])([H])C([H])([H])C2=C1[H])C([H])([H])[H]