参考文献:
Yan, Lin Hale, Jeffrey J. Lynch, Christopher L. Budhu, Richard Gentry, Amy Mills, Sander G. Hajdu, Richard Keohane, Carol Ann Rosenbach, Mark J. Milligan, James A. Shei, Gan-Ju Chrebet, Gary Bergstrom, James Card, Deborah Rosen, Hugh Mandala, Suzanne M. Bioorganic and Medicinal Chemistry Letters, 2004 , vol. 4, # 9 p. 486 - 4866