Wattanasin, Sompong; Weidmann, Beat; Roche, Didier; Myers, Stewart; Xing, Amy; Guo, Qin; Sabio, Michael; Von Matt, Peter; Hugo, Ronald; Maida, Susan; Lake, Philip; Weetall, Marla Bioorganic and Medicinal Chemistry Letters, 2001 , vol. 11, # 22 p. 2955 - 2958