A search for natural bioactive compounds in Bolivia through a multidisciplinary approach. Part I. Evaluation of the antimalarial activity of plants used by the Chacobo Indians - Muñoz,V.; Sauvain,M.; Bourdy,G.; Callapa,J.; Bergeron,S.; Rojas,I.; Bravo,J.A.; Balderrama,L.; Ortiz,B.; Gimenez,A.; Deharo,E. (J. Ethnopharmacol., 2000)