參考文獻:
Luke, Richard W.A. Ballard, Peter Buttar, David Campbell, Leonie Curwen, Jon Emery, Steve C. Griffen, Alison M. Hassall, Lorraine Hayter, Barry R. Jones, Cliff D. McCoull, William Mellor, Martine Swain, Mike L. Tucker, Julie A. Bioorganic and Medicinal Chemistry Letters, 2009 , vol. 19, # 23 p. 6670 - 6674