Anthranoid Compounds with Antiprotozoal Activity from Vismia orientalis - Mbwambo, Zakaria H; Apers, Sandra; Moshi, Mainen J; Kapingu, Modest C; Van Miert, Sabine; Claeys, Magda; Brun, Reto; Cos, Paul; Pieters, Luc; Vlietinck, Arnold (Planta Medica, 2004)