Chemical Composition of Aspidosperma ulei Markgr. and Antiplasmodial Activity of Selected Indole Alkaloids oleh Adrian Martin Pohlit, Raimundo Braz Filho, Marne Carvalho de Vasconcellos, Daniel Esdras de Andrade Uchoa, Emerson Silva Lima, Edilberto Rocha Silveira, Luiz Francisco Rocha e Silva, Zelina Estevam dos Santos Torres