Matulic-Adamic, Jasenka; Daniher, Andrew T.; Karpeisky, Alexander; Haeberli, Peter; Sweedler, David; Beigelman, Leonid Bioorganic and Medicinal Chemistry Letters, 2000, vol. 10, # 11 p. 1299 - 1302 doi: 10.1016/S0960-894X(00)00226-2