Atomic structure
There is only one chemically distinct structure:
O=C(O)CC(=O)OC[C@H]1O[C@@H](Oc2cc(O)cc3[o+]c(-c4ccc(O)c(O)c4)c(O[C@@H]4O[C@H](COC(=O)/C=C/c5ccc(O)cc5)[C@@H](O)[C@H](O)[C@H]4O)cc23)[C@H](O)[C@@H](O)[C@@H]1O