Pfefferkorn, Jeffrey A.; Greene, Meredith L.; Nugent, Richard A.; Gross, Rebecca J.; Mitchell, Mark A.; Finzel, Barry C.; Harris, Melissa S.; Wells, Peter A.; Shelly, John A.; Anstadt, Robert A.; Kilkuskie, Robert E.; Kopta, Laurice A.; Schwende, Francis J. Bioorganic and Medicinal Chemistry Letters, 2005 , vol. 15, # 10 p. 2481 - 2486