Von Geldern, Thomas W.; Tasker, Andrew S.; Sorensen, Bryan K.; Winn, Martin; Szczepankiewicz, Bruce G.; Dixon, Douglas B.; Chiou, William J.; Wang, Liming; Wessale, Jerry L.; Adler, Andy; Marsh, Kennan C.; Nguyen, Bach; Opgenorth, Terry J. Journal of Medicinal Chemistry, 1999 , vol. 42, # 18 p. 3668 - 3678