Apoptosis of HL-60 Leukemia Cells Induced by the Bisindole Alkaloids Sungucine and Isosungucine from Strychnos icaja - Lansiaux, Amélie; Bailly, Christian; Houssier, Claude; Colson, Pierre; De Pauw-Gillet, Marie-Claire; Frédérich, Michel; Tits, Monique; Angenot, Luc (Planta Medica, 2002)