Shearer, Barry G.; Chao, Esther Y.; Uehling, David E.; Deaton, David N.; Cowan, Conrad; Sherman, Bryan W.; Milliken, Tula; Faison, Walter; Brown, Kathleen; Adkison, Kimberly K.; Lee, Frank Bioorganic and Medicinal Chemistry Letters, 2007 , vol. 17, # 16 p. 4670 - 4677