Backbone Stabilized Peptidomimetics Containing Statine-Like Structural Elements: Diastereospecific Synthesis of Trisubstituted Cyclic Ureas and 1,4-Diazepan-2-ones. - Scholz, Dieter; Hecht, Peter; Schmidt, Hannelore; Billich, Andreas (Chemical Monthly / Monatshefte für Chemie, 1999)