COC1=CC2=C(C(OC)=C1)C(O)=C1C(=O)C=C(C)OC1=C2C1=C(OC2OC(C(O)C(O)C2O)C(O)=O)C2=C(OC(C)=CC2=O)C2=C1C=C(O)C=C2OC