COC1=C(O)C=CC(\C=C/C(=O)OC2C(C)OC(OCC3OC(OC(C)(CC4=C(CCC(C)=C4)C(C)=C)C=C)C(OC4OC(C)C(OC5OC(C)C(O)C(O)C5O)C(O)C4O)C(O)C3O)C(O)C2O)=C1