COC1=CC2=C(C(OC)=C1)C1=C(C(=O)C=C(C)O1)C(O)=C2C1=C2OC(C)=CC(=O)C2=C(OC2OC(C(O)C(O)C2O)C(O)=O)C2=C(OC)C(O)=C(OC)C=C12