OC1C(O)C(OC2=C(O)C(=C3OC(=CC(=O)C3=C2O)C2=CC=CC=C2)C2=C(O)C=CC(=C2)C2=CC(=O)C3=C(O)C=C(O)C=C3O2)OC(C1O)C(O)=O