Showing structure for CC1=CC2=C(C(O)=C1)C(=O)C1=C(O)C=C(O)C(=C1C2=O)C1=C(OC2OC(CO)C(O)C(O)C2O)C=C(O)C2=C1C(=O)C1=CC(C)=CC(O)=C1C2=O