Sundén Henrik, Engqvist Magnus, Casas Jesús, Ibrahem Ismail, Córdova Armando
Department of Organic Chemistry, The Arrhenius Laboratory, Stockholm University, Stockholm, Sweden.
Angew Chem Int Ed Engl. 2004 Dec 3;43(47):6532-5. doi: 10.1002/anie.200460295.