Leishmanicidal Constituents from the Leaves of Piper rusbyi - Flores, Ninoska; Cabrera, Gabriela; Jiménez, Ignacio A; Piñero, Jose; Giménez, Alberto; Bourdy, Genevieve; Cortés-Selva, Fernando; Bazzocchi, Isabel L (Planta Medica, 2007)