[H]C1=C([H])C2=C3C(OC4(O2)[C@@]2([H])O[C@]5([H])C([H])([H])C([H])([H])C(=O)[C@]([H])(C(=O)C2([H])[H])[C@]45[H])=C([H])C([H])=C([H])C3=C1[H]