[H]OC1=C([H])C([H])=C(\C([H])=C(/[H])C(=O)OC([H])([H])C(=C(/[H])C([H])([H])C([H])([H])C(=C(/[H])C([H])([H])C([H])([H])C2=C([H])[C@]([H])(OC2=O)C2=C([H])C(O[H])=C([H])C([H])=C2O[H])\C([H])([H])[H])\C([H])([H])[H])C([H])=C1[H]