A study of the trypanocidal and analgesic properties from Lychnophora granmongolense (Duarte) Semir & Leitao Filho - Grael,C.F.; Vichnewski,W.; Souza,G.E.; Lopes,J.L.; Albuquerque,S.; Cunha,W.R. (Phytother. Res., 2000)