參考文獻:
Patt, William C. Cheng, Xue-Min Repine, Joseph T. Lee, Chet Reisdorph, Bill R. Massa, Mark A. Doherty, Annette M. Welch, Kathleen M. Bryant, John W. Flynn, Michael A. Walker, Donnelle M. Schroeder, Richard L. Haleen, Stephen J. Keiser, Joan A. Journal of Medicinal Chemistry, 1999 , vol. 42, # 12 p. 2162 - 2168