Miller, Michael L.; Roller, Elizabeth E.; Wu, Xinyaun; Leece, Barbara A.; Goldmacher, Victor S.; Chari, Ravi V.J.; Ojima, Iwao Bioorganic and Medicinal Chemistry Letters, 2004, vol. 14, # 15 p. 4079 - 4082 doi: 10.1016/j.bmcl.2004.05.027