OC1=CC=C(C=C1)C1CC2=C(C1C1=CC(O)=CC(O)=C1)C(O)=CC(\C=C/C1=CC=C3O[C@H]([C@H](C3=C1)C1=CC(O)=CC(O)=C1)C1=CC=C(O)C=C1)=C2