OC1=CC=C(C=C1)C1OC2=C(C1C1=CC(O)=CC(O)=C1)C1=C(C(C3C1C(C1=CC=C(O)C=C1)C1=C(C=C(O)C=C1O)C1C(OC4=C1C3=CC(O)=C4)C1=CC=C(O)C=C1)C1=CC=C(O)C=C1)C(O)=C2