Antiproliferative and cytotoxic effects of prenylated flavonoids from hops (Humulus lupulus) in human cancer cell lines - Miranda,C.L.; Stevens,J.F.; Helmrich,A.; Henderson,M.C.; Rodriguez,R.J.; Yang,Y.H.; Deinzer,M.L.; Barnes,D.W.; Buhler,D.R. (Food Chem Toxicol, 1999)