Murray, Peter J; Kranz, Michael; Ladlow, Mark; Taylor, Stephen; Berst, Frederic; Holmes, Andrew B; Keavey, Kenneth N; Jaxa-Chamiec, Albert; Seale, Peter W; Stead, Paul; Upton, Richard J; Croft, Simon L; Clegg, William; Elsegood, Mark R.J Bioorganic and Medicinal Chemistry Letters, 2001, vol. 11, # 6 p. 773 - 776 doi: 10.1016/S0960-894X(01)00049-X