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