[H]O[C@@]1([H])C([H])=C([H])OC([H])=C2C([H])([H])[C@]3(SC([H])([H])[H])N(C(=O)[C@@]4(SC([H])([H])[H])N(C3=O)[C@@]3([H])C(=C([H])OC([H])=C([H])[C@]3([H])OC(=O)C([H])([H])[H])C4([H])[H])[C@]12[H]