Screening and Bioguided Fractionation of Amaryllidaceae Species with Anti-Trichomonas vaginalis Activity - de Brum Vieira, Patrícia; Brandt Giordani, Raquel; De Carli, Geraldo Attilio; Zuanazzi, José Angelo Silveira; Tasca, Tiana (Planta Medica, 2011)