Atomic structure

There are 2 chemically distinct structures. Please, select:

[*]O[C@@H]1[C@@H](CO)OC(O[C@H]2[C@@H](O)[C@@H](CO)OC(O[C@@H]3[C@@H](NC(C)=O)[C@@H]([*])O[C@H](CO)[C@@H]3O)[C@@H]2OC2O[C@@H](C)[C@@H](O)[C@@H](O)[C@@H]2O)[C@@H](O)[C@H]1OC1O[C@H](C)[C@H](O)[C@@H](O)[C@H]1O

SVG MW SMILES 3D mol Ionize

[*]O[C@@H]1[C@@H](CO)OC(O[C@H]2[C@@H](O)[C@@H](CO)OC(O[C@@H]3[C@@H](NC(C)=O)[C@@H]([*])O[C@H](CO)[C@@H]3O)[C@@H]2OC2O[C@@H](C)[C@@H](O)[C@@H](O)[C@@H]2O)[C@@H](O)[C@H]1OC1O[C@H](C)[C@H](O)[C@@H](O)[C@H]1O

819.76 g/mol (C₃₂H₅₃R₂NO₂₃, R = next and previous repeats, not counted in mol weight)