Anti-plasmodial activities and X-ray crystal structures of rotenoids from Millettia usaramensis subspecies usaramensis. - Yenesew A; Derese S; Midiwo JO; Oketch-Rabah HA; Lisgarten J; Palmer R; Heydenreich M; Peter MG; Akala H; Wangui J; Liyala P; Waters NC (Phytochemistry, 2003)