OC1=CC=C(C=C1)C1OC2=CC3=C(C(C(O3)C3=CC=C(O)C=C3)C3=CC(O)=CC(O)=C3)C3=C2C1C1=C(C(C3)C2=CC=C(O)C=C2O)C(O)=CC(O)=C1