Macdonald, Simon J. F.; Belton, David J.; Buckley, Doreen M.; Spooner, Julie E.; Anson, Michael S.; Harrison, Lee A.; Mills, Keith; Upton, Richard J.; Dowle, Michael D.; Smith, Robin A.; Molloy, Christopher R.; Risley, Catherine Journal of Medicinal Chemistry, 1998, vol. 41, # 21 p. 3919 - 3922 doi: 10.1021/jm981026s