[H]OC1=C([H])C([H])=C2C(N([H])C3=NC(=C([H])C(C(=O)OC([H])([H])[C@@]([H])(O[H])C([H])([H])O[H])=C23)C2=C(O[H])C([H])([H])[C@@]([H])(OC2=O)C([H])([H])[H])=C1[H]