Navarrete-Vazquez, Gabriel; Yepez, Lilian; Hernandez-Campos, Alicia; Tapia, Amparo; Hernandez-Luis, Francisco; Cedillo, Roberto; Gonzalez, Jose; Martinez-Fernandez, Antonio; Martinez-Grueiro, Mercedes; Castillo, Rafael Bioorganic and Medicinal Chemistry, 2003 , vol. 11, # 21 p. 4615 - 4622