参考文献:
Yan, Lin Huo, Pei Hale, Jeffrey J. Mills, Sander G. Hajdu, Richard Keohane, Carol A. Rosenbach, Mark J. Milligan, James A. Shei, Gan-Ju Chrebet, Gary Bergstrom, James Card, Deborah Mandala, Suzanne M. Bioorganic and Medicinal Chemistry Letters, 7 , vol. 7, # 3 p. 88 - 83