CC1=C(CC2=CC(=C(O)C(=C2)C(C)(C)C)C(C)(C)C)C(C)=C(CC2=CC(=C(O)C(=C2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(=C(O)C(=C1)C(C)(C)C)C(C)(C)C