Chrysopentamine, an Antiplasmodial Anhydronium Base from Strychnos usambarensis Leaves - Frédérich, Michel; Cristino, Assunção; Choi, Young Hae; Verpoorte, Robert; Tits, Monique; Angenot, Luc; Prost, Elise; Nuzillard, Jean-Marc; Zèches-Hanrot, Monique (Planta Medica, 2004)