Pinkerton, Anthony B.; Cube, Rowena V.; Hutchinson, John H.; James, Joyce K.; Gardner, Michael F.; Schaffhauser, Herve; Rowe, Blake A.; Daggett, Lorrie P.; Vernier, Jean-Michel Bioorganic and Medicinal Chemistry Letters, 2004 , vol. 14, # 23 p. 5867 - 5872