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Atomic structure
There is only one chemically distinct structure:
O=C(/C=C/c1ccc(O)cc1)OC[C@H]1O[C@@H](Oc2c(-c3ccc(O)cc3)oc3cc(O)cc(O)c3c2=O)[C@H](OC(=O)/C=C/c2ccc(O)cc2)[C@@H](O)[C@@H]1O