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