Fraley, Mark E.; Hoffman, William F.; Rubino, Robert S.; Hungate, Randall W.; Tebben, Andrew J.; Rutledge, Ruth Z.; McFall, Rosemary C.; Huckle, William R.; Kendall, Richard L.; Coll, Kathleen E.; Thomas, Kenneth A. Bioorganic and Medicinal Chemistry Letters, 2002 , vol. 12, # 19 p. 2767 - 2770