[H]O[C@]1(N([H])C(=O)[C@](OC([H])([H])[H])(N([H])C1=O)C([H])([H])C([H])(C([H])([H])[H])C([H])([H])[H])C([H])([H])C1=C([H])C([H])=C([H])C([H])=C1[H]