A Novel Fragmentation of 7-Azabicyclo[2.2.1]hepta-2,5-dienes: Synthesis of cis-5-Amidino-pyrrolidine-2-acetic Acid Derivatives - Weber, Dirk; Heller, Eberhard; Hoenke, Christoph; Hörer, Stefan; Bäuerle, Peter; Austel, Volkhard (Synthesis, 2005)