參考文獻:
Astles, Peter C. Brealey, Clive Brown, Thomas J. Facchini, Vincenzo Handscombe, Caroline Harris, Neil V. McCarthy, Clive McLay, Iain M. Porter, Barry Roach, Alan G. Sargent, Carol Smith, Christopher Walsh, Roger J. A. Journal of Medicinal Chemistry, 1998 , vol. 41, # 15 p. 2732 - 2744