Atomic structure
There is only one chemically distinct structure:
O=C[C@H]1O[C@H](CO[C@]2(C(=O)O)C[C@@H](O[C@H]3O[C@H]([C@@H](O)CO)[C@@H](O)[C@H](O)[C@@H]3O)[C@@H](O)[C@@H]([C@H](O)CO)O2)[C@@H](O)[C@@H]1O