Zhou, Ping; Yan, Yinfa; Bernotas, Ronald; Harrison, Boyd L.; Huryn, Donna; Robichaud, Albert J.; Zhang, Guo Ming; Smith, Deborah L.; Schechter, Lee E. Bioorganic and Medicinal Chemistry Letters, 2005, vol. 15, # 5 p. 1393 - 1396 doi: 10.1016/j.bmcl.2005.01.005