Tipparaju, Suresh K.; Joyasawal, Sipak; Forrester, Sara; Mulhearn, Debbie C.; Pegan, Scott; Johnson, Michael E.; Mesecar, Andrew D.; Kozikowski, Alan P. Bioorganic and Medicinal Chemistry Letters, 2008 , vol. 18, # 12 p. 3565 - 3569