New Cytotoxic Prenylated Isoflavonoids from Bituminaria morisiana - Cottiglia, Filippo; Casu, Laura; Bonsignore, Leonardo; Casu, Mariano; Floris, Costantino; Leonti, Marco; Gertsch, Jürg; Heilmann, Jörg (Planta Medica, 2005)