CC1OC(OCC2OC(OC(C)(CC3=C(CCC(C)=C3)C(C)=C)C=C)C(OC3OC(C)C(OC4OC(C)C(O)C(O)C4O)C(O)C3O)C(O)C2O)C(O)C(O)C1O