Cytotoxic Effect of the Pentacyclic Oxindole Alkaloid Mitraphylline Isolated from Uncaria tomentosa Bark on Human Ewing's Sarcoma and Breast Cancer Cell Lines - García Giménez, Dolores; García Prado, Elena; Sáenz Rodríguez, Teresa; Fernández Arche, Angeles; De la Puerta, Rocío (Planta Medica, 2010)