[H]C1=C([H])C2=C([H])C([H])=C([H])C3=C2C(OC2(O3)[C@@]3([H])O[C@]4([H])C([H])=C([H])C(=O)[C@]([H])(C(=O)C3([H])[H])[C@]24[H])=C1[H]