Aissaoui, Hamed; Koberstein, Ralf; Zumbrunn, Cornelia; Gatfield, John; Brisbare-Roch, Catherine; Jenck, Francois; Treiber, Alexander; Boss, Christoph Bioorganic and Medicinal Chemistry Letters, 2008 , vol. 18, # 21 p. 5729 - 5733