Duttwyler Simon, Do Quyen-Quyen, Linden Anthony, Baldridge Kim K, Siegel Jay S
Organic Chemistry Institute, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
Angew Chem Int Ed Engl. 2008;47(9):1719-22. doi: 10.1002/anie.200705291.