Chu, Guo-Hua; Gu, Minghua; Cassel, Joel A.; Belanger, Serge; Stabley, Gabriel. J.; DeHaven, Robert N.; Conway-James, Nathalie; Koblish, Mike; Little, Patrick J.; DeHaven-Hudkins, Diane L.; Dolle, Roland E. Bioorganic and Medicinal Chemistry Letters, 2006 , vol. 16, # 3 p. 645 - 648