Atomic structure
There is only one chemically distinct structure:
O=C(/C=C/c1ccc(O)cc1)OC[C@H]1O[C@@H](Oc2cc(O)c3c(=O)c(O)c(-c4ccc(O)cc4)oc3c2)[C@H](O)[C@@H](O)[C@@H]1O