Peifer, Christian; Stoiber, Thomas; Unger, Eberhard; Totzke, Frank; Schaechtele, Christoph; Marme, Dieter; Brenk, Ruth; Klebe, Gerhard; Schollmeyer, Dieter; Dannhardt, Gerd Journal of Medicinal Chemistry, 2006 , vol. 49, # 4 p. 1271 - 1281