Atomic structure
There is only one chemically distinct structure:
[*]O[C@H]1[C@H](NC(C)=O)[C@H](O[C@@H]2[C@@H](NC(C)=O)[C@@H](O[C@@H]3[C@@H](O)[C@H](C)O[C@@H]([*])[C@H]3NC(C)=O)O[C@H](C(=O)O)[C@@H]2O[C@@H]2O[C@@H](C)[C@H](O)[C@@H](O)[C@@H]2NC(C)=O)O[C@@H](C)[C@@H]1O