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