Procopiou, Panayiotis A.; Ford, Alison J.; Graves, Rebecca H.; Hall, David A.; Hodgson, Simon T.; Lacroix, Yannick M.L.; Needham, Deborah; Slack, Robert J. Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 8 p. 2730 - 2733 doi: 10.1016/j.bmcl.2012.02.104