OC1C(O)C(OC2=CC(=CC(O)=C2O)C(=O)OC2OC3COC(=O)C4=CC(O)=C(O)C(O)=C4OC4=C(O)C=C5C(=O)OC6=C(C(=CC(O)=C6O)C(=O)OC3C(O)C2O)C5=C4O)OC(C1O)C(O)=O