Bernotas, Ronald; Lenicek, Steven; Antane, Schuyler; Zhang, Guo Ming; Smith, Deborah; Coupet, Joseph; Harrison, Boyd; Schechter, Lee E. Bioorganic and Medicinal Chemistry Letters, 2004, vol. 14, # 22 p. 5499 - 5502 doi: 10.1016/j.bmcl.2004.09.003