O1C(=O)C2=C(O)C13CC(C=O)=CC(O)C3C=C(C)C(C=CC(C)C4C=CC5C(OC6OC(C)C(O)C(OC(=O)C)C6)C(C)CC(C)C5C4(C)C2=O)OC7OC(C)C(NC(=O)OC)C(C)(C7)N(O)=O