Constituents of Tropical Medicinal Plants, IXX1 GC/MS-Investigations of the Constituents of Piper amalago - 30 New Amides of the Piperine-Type - Achenbach, Hans; Fietz, Wolfgang; Wörth, Jürgen; Waibel, Reiner; Portecop, Jacques (Planta Medica, 1986)