Zhao, Shu-Hai; Berger, Jacob; Clark, Robin D.; Sethofer, Steven G.; Krauss, Nancy E.; Brothers, Julie M.; Martin, Renee S.; Misner, Dinah L.; Schwab, Dietmar; Alexandrova, Ludmila Bioorganic and Medicinal Chemistry Letters, 2007 , vol. 17, # 12 p. 3504 - 3507